Allow personal access token in `/kubernetes/authorize_proxy_user`
Depends on Add new k8s_proxy scope for PATs (#422408 - closed)
Use the same feature flag as that MR.
Proposal
lib/api/internal/kubernetes.rb
provides a user to AuthorizeProxyUserService
. Right now it depends on session data to get the user. We want to update where it can depend on personal access token instead of a session.