fix: Fix Sensor Validation for admission webhook #3640
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We have been running into an issue when deleting sensors, when the eventbus has already been deleted. When we try to remove the finalizer from a sensor we're attempting to force delete, the admission webhook denies the request with:
This PR should fix this bug.
While creating additional test cases to catch this bug, also noticed that the current code panics when eventBusClient is nil, so added a guard against that as well.
Checklist: