MM-24872/MM-24873: local mode support for addTeamMember and removeTeamMember (#14534)

* Add local mode handler for addTeamMember

* Add local mode handler for remoteTeamMember

* short circuit session team permission for local mode

Co-authored-by: Ibrahim Serdar Acikgoz <serdaracikgoz86@gmail.com>
Co-authored-by: Miguel de la Cruz <miguel@mcrx.me>

app/authorization.go

@@ -26,6 +26,9 @@ func (a *App) SessionHasPermissionToTeam(session model.Session, teamId string, p
 	if teamId == "" {
 		return false
 	}
+	if session.IsUnrestricted() {
+		return true
+	}
 
 	teamMember := session.GetTeamByTeamId(teamId)
 	if teamMember != nil {