Bump vendored Sidekiq gem to 7.2.4

What does this MR do and why?

This MR bumps our vendored Sidekiq gem from 7.1.6 to 7.2.4. The gem was vendored using gem unpack sidekiq, moving the folder into vendor/gems. Gemfile, Rakefile and tests were copied from github repo.

Reference to MR introducing the vendored gem: !142986 (merged)

See #480283 (closed)

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