Thanos Compact Pods can get stuck in crashlooping state

Because the StatefulSet for Thanos compact runs as a singleton, if it gets into a state where the Pod is erroring and crashloops, you may not be able to apply changes to update it without deleting the ThanosCompact CR.

We could set the podManagementPolicy to Parallel as per https://stackoverflow.com/questions/66612592/redeploy-statefulset-with-crashloopbackoff-status-in-kubernetes