Migrate TPU tests to GitHub actions (#14687)

* Migrate TPU tests to GitHub actions

* No working dir

* Keep _target

* Dont skip draft

* CHECK_SLEEP

* Not yet

* Remove recurrent cleanup script

* Set secrets

* a step cannot have both the `uses` and `run` keys

* Version $PYTHON_VER was not found in the local cache

* can't load package ... ($GOPATH not set)

* The `set-env` command is disabled

* Try updating go

* Match timeout

* simplify path

* More cleanup

* Install coverage. Unmark draft

* Update .github/workflows/ci-pytorch-test-tpu.yml

* DEBUG echo

* Revert "DEBUG echo"

This reverts commit 4011856e6ea076e45fe40b942c20ee63ed7433f3.

* More debug

* SSH

* Im stupid

* Remove always()

* Forgot some

Co-authored-by: Jirka Borovec <[email protected]>
Co-authored-by: Luca Antiga <[email protected]>