Show all invited groups in access dropdown

What does this MR do and why?

Show all invited groups in access dropdown

Allow private groups that have been invited to the project to appear in protected ref access dropdowns for project maintainers

Contributes to: #345140 (closed)

More context here: #345140 (comment 1712756086)

Frontend changes that will use this: !140928 (merged)

New queries:

• explain project.member?: https://console.postgres.ai/gitlab/gitlab-production-tunnel-pg12/sessions/25104/commands/79745
• explain project.invited_groups: https://console.postgres.ai/gitlab/gitlab-production-tunnel-pg12/sessions/25104/commands/79746

MR acceptance checklist

Please evaluate this MR against the MR acceptance checklist. It helps you analyze changes to reduce risks in quality, performance, reliability, security, and maintainability.

Related to #345140 (closed)