Record used SSH keys only once per day

What does this MR do?

It uses Gitlab::ExclusiveLease to make sure that we enqueue Sidekiq job at most once per day for given key.

Why was this MR needed?

Performance problems described in #26877 (closed)

Does this MR meet the acceptance criteria?

• Changelog entry added
• [ ] Documentation created/updated
• [ ] API support added
• Tests
  • Added for this feature/bug
  • All builds are passing
• Conform by the merge request performance guides
• Conform by the style guides
• Branch has no merge conflicts with master (if it does - rebase it please)
• Squashed related commits together

What are the relevant issue numbers?

Closes https://gitlab.com/gitlab-org/gitlab-ce/issues/26877