MM-53962: Adding ES8 dependency (#24399)

* Adding ES8 dependency

```release-note
NONE
```


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

server/go.mod

@@ -15,6 +15,7 @@ require (
 	github.com/dgryski/dgoogauth v0.0.0-20190221195224-5a805980a5f3
 	github.com/disintegration/imaging v1.6.2
 	github.com/dyatlov/go-opengraph/opengraph v0.0.0-20220524092352-606d7b1e5f8a
+	github.com/elastic/go-elasticsearch/v8 v8.4.0-alpha.1.0.20230719162115-b74bbf87c923
 	github.com/fatih/color v1.16.0
 	github.com/fsnotify/fsnotify v1.7.0
 	github.com/getsentry/sentry-go v0.27.0
@@ -79,7 +80,6 @@ require (
 	golang.org/x/term v0.17.0
 	golang.org/x/tools v0.18.0
 	gopkg.in/mail.v2 v2.3.1
-	gopkg.in/olivere/elastic.v6 v6.2.37
 	gopkg.in/yaml.v2 v2.4.0
 )
 
@@ -119,9 +119,9 @@ require (
 	github.com/dgryski/go-rendezvous v0.0.0-20200823014737-9f7001d12a5f // indirect
 	github.com/dsnet/compress v0.0.2-0.20210315054119-f66993602bf5 // indirect
 	github.com/dustin/go-humanize v1.0.1 // indirect
+	github.com/elastic/elastic-transport-go/v8 v8.0.0-20230329154755-1a3c63de0db6 // indirect
 	github.com/fatih/set v0.2.1 // indirect
 	github.com/felixge/httpsnoop v1.0.4 // indirect
-	github.com/fortytw2/leaktest v1.3.0 // indirect
 	github.com/francoispqt/gojay v1.2.13 // indirect
 	github.com/gigawattio/window v0.0.0-20180317192513-0f5467e35573 // indirect
 	github.com/go-asn1-ber/asn1-ber v1.5.5 // indirect
@@ -148,7 +148,6 @@ require (
 	github.com/isacikgoz/fuzzy v0.2.0 // indirect
 	github.com/jmespath/go-jmespath v0.4.0 // indirect
 	github.com/jonboulle/clockwork v0.4.0 // indirect
-	github.com/josharian/intern v1.0.0 // indirect
 	github.com/json-iterator/go v1.1.12 // indirect
 	github.com/klauspost/cpuid/v2 v2.2.7 // indirect
 	github.com/klauspost/pgzip v1.2.6 // indirect
@@ -156,7 +155,6 @@ require (
 	github.com/lann/ps v0.0.0-20150810152359-62de8c46ede0 // indirect
 	github.com/levigross/exp-html v0.0.0-20120902181939-8df60c69a8f5 // indirect
 	github.com/magiconair/properties v1.8.7 // indirect
-	github.com/mailru/easyjson v0.7.7 // indirect
 	github.com/mattermost/xml-roundtrip-validator v0.1.0 // indirect
 	github.com/mattn/go-colorable v0.1.13 // indirect
 	github.com/mattn/go-isatty v0.0.20 // indirect
@@ -174,7 +172,6 @@ require (
 	github.com/nwaples/rardecode v1.1.3 // indirect
 	github.com/oklog/run v1.1.0 // indirect
 	github.com/olekukonko/tablewriter v0.0.5 // indirect
-	github.com/olivere/elastic v6.2.37+incompatible // indirect
 	github.com/otiai10/gosseract/v2 v2.4.1 // indirect
 	github.com/pborman/uuid v1.2.1 // indirect
 	github.com/pelletier/go-toml v1.9.5 // indirect