Remove omniauth_login_minimal_scopes feature flag

Merged Alex Kalderimis requested to merge ff-remove-omniauth_login_minimal_scopes into master

What does this MR do and why?

This MR releases the omniauth minimal scope feature, introduced in !78556 (merged) and rolled-out in #351331 (closed)

MR acceptance checklist

This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.

Edited by Alex Kalderimis