Fixes [#16805](https://github.com/twentyhq/twenty/issues/16805)
User was not able to update his own profile picture it showed permisson
error while doing so.
Updated permission so that user is able to edit profile picture
<!-- CURSOR_SUMMARY -->
---
> [!NOTE]
> Ensures profile picture uploads succeed only with appropriate
permissions and clearer errors.
>
> - Tightens `UploadProfilePicturePermissionGuard` to handle missing
`workspace`, allow during workspace creation, and permit uploads when
user has `WORKSPACE_MEMBERS` or `PROFILE_INFORMATION` settings;
otherwise throws a `PermissionsException` with a user-friendly message
> - In `user-workspace.resolver.ts`, validates the upload result and
throws an error if no files were returned
>
> <sup>Written by [Cursor
Bugbot](https://cursor.com/dashboard?tab=bugbot) for commit
3766bac15e340bdd467de3a9d923dbd697aab3db. This will update automatically
on new commits. Configure
[here](https://cursor.com/dashboard?tab=bugbot).</sup>
<!-- /CURSOR_SUMMARY -->
---------
Co-authored-by: Félix Malfait <felix@twenty.com>
ANKIT VARSHNEY
8d130908c2