Use dig, not direct indexing for field that may not exist in RestartTask #841
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When invoking the restart task via annotations,
kraneiterates over all resources in the namespace in search of the restart annotation. However, not all resources may define anannotationsfield in their metadata, andkranecurrently indexes intoannotationsvia[]. This causes aNoMethodErrorsinceannotationsisnil.This PR changes the raw indexing to using
#dig, instead. The current CI suite captures the fact that this change is valid.