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/retrylayer/retrylayer.go

@@ -10400,11 +10400,11 @@ func (s *RetryLayerSharedChannelStore) GetRemoteForUser(remoteId string, userId
 
 }
 
-func (s *RetryLayerSharedChannelStore) GetRemotes(opts model.SharedChannelRemoteFilterOpts) ([]*model.SharedChannelRemote, error) {
+func (s *RetryLayerSharedChannelStore) GetRemotes(offset int, limit int, opts model.SharedChannelRemoteFilterOpts) ([]*model.SharedChannelRemote, error) {
 
 	tries := 0
 	for {
-		result, err := s.SharedChannelStore.GetRemotes(opts)
+		result, err := s.SharedChannelStore.GetRemotes(offset, limit, opts)
 		if err == nil {
 			return result, nil
 		}