MM-53962: Adding ES8 dependency (#24399)

* Adding ES8 dependency

```release-note
NONE
```


Co-authored-by: Mattermost Build <build@mattermost.com>

webapp/channels/src/components/admin_console/__snapshots__/elasticsearch_settings.test.tsx.snap

@@ -52,6 +52,30 @@ exports[`components/ElasticSearchSettings should match snapshot, disabled 1`] =
         }
         value={false}
       />
+      <AdminTextSetting
+        disabled={true}
+        helpText={
+          <Memo(MemoizedFormattedMessage)
+            defaultMessage="The type of the search backend."
+            id="admin.elasticsearch.backendDescription"
+          />
+        }
+        id="backend"
+        label={
+          <Memo(MemoizedFormattedMessage)
+            defaultMessage="Backend type:"
+            id="admin.elasticsearch.backendTitle"
+          />
+        }
+        onChange={[Function]}
+        placeholder={
+          Object {
+            "defaultMessage": "E.g.: \\"elasticsearch\\"",
+            "id": "admin.elasticsearch.backendExample",
+          }
+        }
+        setByEnv={false}
+      />
       <AdminTextSetting
         disabled={true}
         helpText={
@@ -602,6 +626,30 @@ exports[`components/ElasticSearchSettings should match snapshot, enabled 1`] = `
         }
         value={true}
       />
+      <AdminTextSetting
+        disabled={false}
+        helpText={
+          <Memo(MemoizedFormattedMessage)
+            defaultMessage="The type of the search backend."
+            id="admin.elasticsearch.backendDescription"
+          />
+        }
+        id="backend"
+        label={
+          <Memo(MemoizedFormattedMessage)
+            defaultMessage="Backend type:"
+            id="admin.elasticsearch.backendTitle"
+          />
+        }
+        onChange={[Function]}
+        placeholder={
+          Object {
+            "defaultMessage": "E.g.: \\"elasticsearch\\"",
+            "id": "admin.elasticsearch.backendExample",
+          }
+        }
+        setByEnv={false}
+      />
       <AdminTextSetting
         disabled={false}
         helpText={

webapp/channels/src/components/admin_console/elasticsearch_settings.tsx

@@ -24,6 +24,7 @@ import TextSetting from './text_setting';
 
 interface State extends BaseState {
     connectionUrl: string;
+    backend: string;
     skipTLSVerification: boolean;
     ca: string;
     clientCert: string;
@@ -50,6 +51,7 @@ export const messages = defineMessages({
     enableIndexingDescription: {id: 'admin.elasticsearch.enableIndexingDescription', defaultMessage: 'When true, indexing of new posts occurs automatically. Search queries will use database search until "Enable Elasticsearch for search queries" is enabled. <link>Learn more about Elasticsearch in our documentation.</link>'},
     connectionUrlTitle: {id: 'admin.elasticsearch.connectionUrlTitle', defaultMessage: 'Server Connection Address:'},
     connectionUrlDescription: {id: 'admin.elasticsearch.connectionUrlDescription', defaultMessage: 'The address of the Elasticsearch server. <link>Please see documentation with server setup instructions.</link>'},
+    backendTitle: {id: 'admin.elasticsearch.backendTitle', defaultMessage: 'Backend type:'},
     skipTLSVerificationTitle: {id: 'admin.elasticsearch.skipTLSVerificationTitle', defaultMessage: 'Skip TLS Verification:'},
     skipTLSVerificationDescription: {id: 'admin.elasticsearch.skipTLSVerificationDescription', defaultMessage: 'When true, Mattermost will not require the Elasticsearch certificate to be signed by a trusted Certificate Authority.'},
     usernameTitle: {id: 'admin.elasticsearch.usernameTitle', defaultMessage: 'Server Username:'},
@@ -100,6 +102,7 @@ export const searchableStrings: Array<string|MessageDescriptor|[MessageDescripto
 export default class ElasticsearchSettings extends AdminSettings<Props, State> {
     getConfigFromState = (config: AdminConfig) => {
         config.ElasticsearchSettings.ConnectionURL = this.state.connectionUrl;
+        config.ElasticsearchSettings.Backend = this.state.backend;
         config.ElasticsearchSettings.SkipTLSVerification = this.state.skipTLSVerification;
         config.ElasticsearchSettings.CA = this.state.ca;
         config.ElasticsearchSettings.ClientCert = this.state.clientCert;
@@ -118,6 +121,7 @@ export default class ElasticsearchSettings extends AdminSettings<Props, State> {
     getStateFromConfig(config: AdminConfig) {
         return {
             connectionUrl: config.ElasticsearchSettings.ConnectionURL,
+            backend: config.ElasticsearchSettings.Backend,
             skipTLSVerification: config.ElasticsearchSettings.SkipTLSVerification,
             ca: config.ElasticsearchSettings.CA,
             clientCert: config.ElasticsearchSettings.ClientCert,
@@ -150,7 +154,7 @@ export default class ElasticsearchSettings extends AdminSettings<Props, State> {
             }
         }
 
-        if (id === 'connectionUrl' || id === 'skipTLSVerification' || id === 'username' || id === 'password' || id === 'sniff' || id === 'ca' || id === 'clientCert' || id === 'clientKey') {
+        if (id === 'connectionUrl' || id === 'backend' || id === 'skipTLSVerification' || id === 'username' || id === 'password' || id === 'sniff' || id === 'ca' || id === 'clientCert' || id === 'clientKey') {
             this.setState({
                 configTested: false,
                 canSave: false,
@@ -261,6 +265,23 @@ export default class ElasticsearchSettings extends AdminSettings<Props, State> {
                     setByEnv={this.isSetByEnv('ElasticsearchSettings.EnableIndexing')}
                     disabled={this.props.isDisabled}
                 />
+                <TextSetting
+                    id='backend'
+                    label={
+                        <FormattedMessage {...messages.backendTitle}/>
+                    }
+                    placeholder={defineMessage({id: 'admin.elasticsearch.backendExample', defaultMessage: 'E.g.: "elasticsearch"'})}
+                    helpText={
+                        <FormattedMessage
+                            id='admin.elasticsearch.backendDescription'
+                            defaultMessage='The type of the search backend.'
+                        />
+                    }
+                    value={this.state.backend}
+                    disabled={this.props.isDisabled || !this.state.enableIndexing}
+                    onChange={this.handleSettingChanged}
+                    setByEnv={this.isSetByEnv('ElasticsearchSettings.Backend')}
+                />
                 <TextSetting
                     id='connectionUrl'
                     label={

webapp/channels/src/i18n/en.json

@@ -741,6 +741,9 @@
   "admin.database.search_backend.title": "Active Search Backend",
   "admin.database.title": "Database",
   "admin.developer.title": "Developer Settings",
+  "admin.elasticsearch.backendDescription": "The type of the search backend.",
+  "admin.elasticsearch.backendExample": "E.g.: \"elasticsearch\"",
+  "admin.elasticsearch.backendTitle": "Backend type:",
   "admin.elasticsearch.bulkIndexingTitle": "Bulk Indexing:",
   "admin.elasticsearch.caDescription": "(Optional) Custom Certificate Authority certificates for the Elasticsearch server. Leave this empty to use the default CAs from the operating system.",
   "admin.elasticsearch.caExample": "E.g.: \"./elasticsearch/ca.pem\"",

webapp/platform/types/src/config.ts

@@ -795,6 +795,7 @@ export type AnalyticsSettings = {
 
 export type ElasticsearchSettings = {
     ConnectionURL: string;
+    Backend: string;
     Username: string;
     Password: string;
     EnableIndexing: boolean;