[WIP] [MM-55031] OAuth Outgoing Connection App integration (#25379)

* OAuthOutgoingConnection model

* added store

* make generated

* add missing license headers

* fix receiver name

* i18n

* i18n sorting

* update migrations from master

* make migrations-extract

* update retrylayer tests

* replaced sql query with id pagination

* fixed flaky tests

* missing columns

* missing columns on save/update

* typo

* improved tests

* remove enum from mysql colum

* add password credentials to store

* license changes

* OAuthOutgoingConnectionInterface

* Oauth -> OAuth

* make generated

* merge migrations

* renamed migrations

* model change suggestions

* refactor test functionsn

* migration typo

* refactor store table names

* updated sanitize test

* cleanup merge

* refactor symbol

* list endpoint

* oauthoutgoingconnection -> outgoingoauthconnection

* signature change

* i18n update

* granttype typo

* naming

* api list

* uppercase typo

* i18n

* missing license header

* fixed path in comments

* updated openapi definitions

* sanitize connections

* make generated

* test license and no feature flag

* removed t.fatal

* updated testhelper calls

* yaml schema fixes

* switched interface name

* suggested translation

* missing i18n translation

* address comments

* updated i18n

server/i18n/en.json

@@ -1657,6 +1657,18 @@
     "id": "api.context.mfa_required.app_error",
     "translation": "Multi-factor authentication is required on this server."
   },
+  {
+    "id": "api.context.outgoing_oauth_connection.list_connections.app_error",
+    "translation": "There was an error while listing outgoing OAuth connections."
+  },
+  {
+    "id": "api.context.outgoing_oauth_connection.list_connections.input_error",
+    "translation": "Invalid input parameters."
+  },
+  {
+    "id": "api.context.outgoing_oauth_connection.not_available.feature_flag",
+    "translation": "This feature is restricted by a feature flag."
+  },
   {
     "id": "api.context.permissions.app_error",
     "translation": "You do not have the appropriate permissions."
@@ -8158,6 +8170,30 @@
     "id": "ent.migration.migratetosaml.username_already_used_by_other_user",
     "translation": "Username already used by another Mattermost user."
   },
+  {
+    "id": "ent.outgoing_oauth_connections.delete_connection.app_error",
+    "translation": "There was an error while deleting the outgoing oauth connection."
+  },
+  {
+    "id": "ent.outgoing_oauth_connections.get_connection.app_error",
+    "translation": "There was an error retrieving the outgoing oauth connection."
+  },
+  {
+    "id": "ent.outgoing_oauth_connections.get_connection.not_found.app_error",
+    "translation": "The outgoing oauth connection was not found."
+  },
+  {
+    "id": "ent.outgoing_oauth_connections.get_connections.app_error",
+    "translation": "There was an error retrieving the outgoing oauth connections."
+  },
+  {
+    "id": "ent.outgoing_oauth_connections.save_connection.app_error",
+    "translation": "There was an error saving the outgoing oauth connection."
+  },
+  {
+    "id": "ent.outgoing_oauth_connections.update_connection.app_error",
+    "translation": "There was an error updating the outgoing oauth connection."
+  },
   {
     "id": "ent.saml.attribute.app_error",
     "translation": "SAML login was unsuccessful because one of the attributes is incorrect. Please contact your System Administrator."