Skip is_flaky tests in the CI (#37723)
* No more red flaky tests in the CI!
* Remove the CircleCI logic as well
* Revert most changes including is_flaky behaviour
* make fixup
* Move to a more sensible place
* Mark a flaky test that failed on this PR!
* correct import
* update
* update
* update
* update
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Co-authored-by: ydshieh <ydshieh@users.noreply.github.com>