Fix RSpec/TimecopFreeze offenses (Part 2/2)

What does this MR do and why?

🚫 This MR depends on !76030 (merged).

This fixes some of the remaining RSpec/TimecopFreeze offenses in:

• ee/spec/lib/gitlab/geo/git_push_http_spec.rb
• ee/spec/lib/gitlab/geo/log_cursor/daemon_spec.rb
• ee/spec/lib/gitlab/geo/oauth/login_state_spec.rb

This MR is part 2 of a 2 part series of MRs to resolve RSpec/TimecopFreeze of #214432 (closed).

MR acceptance checklist

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