Unquarantine project service blob and commit

What does this MR do and why?

Resolves flaky spec reported in #418757 (closed)

I was not able to reproduce this with --bisect, but we know let_it_be_with_refind forces a hard reload, which should be more reliable than let_it_be_with_reload, so I propose we merge this fix and observe if this removes the flakiness from the spec.

Due to https://gitlab.com/gitlab-org/gitlab/-/blob/master/spec/support/helpers/project_helpers.rb#L9:

project.update!(params.merge(additional_params))

project is being mutated in this step, so the shared project record risks having leaked state.

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