Show SAML badges for projects under nested subgroups for direct members

Related to #421482 (closed)

What does this MR do and why?

This MR addresses the issue of the SAML badge not displaying on a project level (projects in subgroups) for direct members. The issue occurs when an existing group_saml user in a project (with a SAML badge), is overridden to a different role.

Screenshots or screen recordings

Group Hierarchy	Project In SubGroup

How to set up and validate locally

Requires an EE license to test on GDK since group-saml is only available in the premium/ultimate tiers on SASS.

1. Set up SimpleSAML with GDK:

   • Follow the SimpleSAML setup guide for integration with GDK.
   • Configure the identity provider (Simple SAML) to service provider (Gitlab).

2. Create test users with SimpleSAML:

   • Sign in using SSO to Gitlab as test users on an incognito browser session.

3. Create nested subgroups and projects:

   • Set up a hierarchy like group -> subgroup -> project.
   • Invite users to the parent group.
   • Override a user to a higher role in the nested project.
   • Verify that the SAML badge still shows in the project-level.

MR acceptance checklist

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