Remove tpu cleaning job from CI

[daniellepintz]

What does this PR do?

The TPU Cleaning job is failing pretty consistently in CI causing our CI to be red. Is it okay to remove this job? Or do we want to fix it to make it work again?
Fixes #8961

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[carmocca]

I think it's necessary, but the job runs every 20 minutes and fails from time to time.
I don't know what causes the failure, though.

cc: @Borda @kaushikb11

[Borda]

no, this is our insurance against hacking TPU resources, we need to preserve it and fix it if needed :]

[daniellepintz]

@Borda sounds good