Fix RSpec/TimecopFreeze offenses

Ref: #214432 (closed)

What does this MR do and why?

This MR fixes the RSpec/TimecopFreeze remaining offenses except for qa/spec/support/repeater_spec.rb which I could not fix it entirely yet.

Why are we doing this?

Rails introduced a TimeHelpers so we don't need this gem anymore and we will remove it in a follow up MR.

The API is slightly different and we cannot pass an argument to freeze_time which is why we use travel_to a lot in this MR.

MR acceptance checklist

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