Adds Shared Channel related API endpoints (#27436)

* Adds Shared Channel management API endpoints

New endpoints for the following routes are added:

- Get Shared Channel Remotes by Remote Cluster at `GET
/api/v4/remotecluster/{remote_id}/sharedchannelremotes`
- Invite Remote Cluster to Channel at `POST
/api/v4/remotecluster/{remote_id}/channels/invite`
- Uninvite Remote Cluster to Channel at `POST
/api/v4/remotecluster/{remote_id}/channels/uninvite`

These endpoints are planned to be used from the system console, and
gated through the `manage_secure_connections` permission.

* Adds i18n messages for API errors

* Fix pagination flaky test

* Fix linter

* Adds the posibility of filtering shared channel remotes by home

---------

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

server/channels/web/params.go

@@ -100,6 +100,8 @@ type Params struct {
 	OnlyConfirmed             bool
 	OnlyPlugins               bool
 	ExcludePlugins            bool
+	ExcludeHome               bool
+	ExcludeRemote             bool
 
 	//Bookmarks
 	ChannelBookmarkId string
@@ -169,6 +171,8 @@ func ParamsFromRequest(r *http.Request) *Params {
 	params.OnlyConfirmed, _ = strconv.ParseBool(query.Get("only_confirmed"))
 	params.OnlyPlugins, _ = strconv.ParseBool(query.Get("only_plugins"))
 	params.ExcludePlugins, _ = strconv.ParseBool(query.Get("exclude_plugins"))
+	params.ExcludeHome, _ = strconv.ParseBool(query.Get("exclude_home"))
+	params.ExcludeRemote, _ = strconv.ParseBool(query.Get("exclude_remote"))
 	params.ChannelBookmarkId = props["bookmark_id"]
 	params.Scope = query.Get("scope")