Perform gitlab-ci-token authentication always using primary

What does this MR do?

Improves: https://gitlab.com/gitlab-org/gitlab-ce/issues/46037 making gitlab-ci-token auth requests to always use primary.

This is targeted change, that switches to primary only when gitlab-ci-token login is used, and for very short period of time.

This aids against high replication lag, and builds having OTP token generated.

Does this MR meet the acceptance criteria?

• Changelog entry added, if necessary
• Tests added for this feature/bug
• Conform by the code review guidelines
  • Has been reviewed by a Backend maintainer
  • Has been reviewed by a Database specialist
• EE specific content should be in the top level /ee folder
• Conform by the merge request performance guides
• Conform by the style guides
• If you have multiple commits, please combine them into a few logically organized commits by squashing them
• End-to-end tests pass (package-qa manual pipeline job)

What are the relevant issue numbers?

Related to https://gitlab.com/gitlab-org/gitlab-ce/issues/46037