[MM-48727] Restore license checks for SSO in self-hosted deployments (#21781)

* Revert license checks for sso integrations

 - Revert license check changes for open-id connect options
 - Add option to integrate openid-connect for all cloud offerings

* Move enterprise SSO features back to enterprise repository

cmd/mattermost/main.go

@@ -11,9 +11,6 @@ import (
 	_ "github.com/mattermost/mattermost-server/v6/app/slashcommands"
 	// Plugins
 	_ "github.com/mattermost/mattermost-server/v6/model/oauthproviders/gitlab"
-	_ "github.com/mattermost/mattermost-server/v6/model/oauthproviders/google"
-	_ "github.com/mattermost/mattermost-server/v6/model/oauthproviders/office365"
-	_ "github.com/mattermost/mattermost-server/v6/model/oauthproviders/openid"
 
 	// Enterprise Imports
 	_ "github.com/mattermost/mattermost-server/v6/imports"