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/store/timerlayer/timerlayer.go

@@ -8201,10 +8201,10 @@ func (s *TimerLayerSharedChannelStore) GetRemoteForUser(remoteId string, userId
 	return result, err
 }
 
-func (s *TimerLayerSharedChannelStore) GetRemotes(opts model.SharedChannelRemoteFilterOpts) ([]*model.SharedChannelRemote, error) {
+func (s *TimerLayerSharedChannelStore) GetRemotes(offset int, limit int, opts model.SharedChannelRemoteFilterOpts) ([]*model.SharedChannelRemote, error) {
 	start := time.Now()
 
-	result, err := s.SharedChannelStore.GetRemotes(opts)
+	result, err := s.SharedChannelStore.GetRemotes(offset, limit, opts)
 
 	elapsed := float64(time.Since(start)) / float64(time.Second)
 	if s.Root.Metrics != nil {