Long task warn to err (#12705)
Long task warn to err (#12705)

* Changes warning to error

* Updates unit test

* Revert "Updates unit test"

This reverts commit 7cc210742c2abfcbcd76fbc4a46ad8829b24a0a3.

* Log less info upon long task violation

* Un-revert unit test changes

* Un-removes 3 metrics because Malte said they're ok

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