Optimize metadata queries (#7013)

In this PR:

1. Refactor guards to avoid duplicated queries: WorkspaceAuthGuard and
UserAuthGuard only check for existence of workspace and user in the
request without querying the database

packages/twenty-server/src/engine/metadata-modules/object-metadata/utils/assert-mutation-not-on-remote-object.util.ts

@@ -6,7 +6,7 @@ import {
 } from 'src/engine/metadata-modules/object-metadata/object-metadata.exception';
 
 export const assertMutationNotOnRemoteObject = (
-  objectMetadataItem: ObjectMetadataInterface,
+  objectMetadataItem: Pick<ObjectMetadataInterface, 'isRemote'>,
 ) => {
   if (objectMetadataItem.isRemote) {
     throw new ObjectMetadataException(