Allow TinkerbellMachine to be removed when no Hardware exists: #421
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Description
When a Hardware object corresponding to a tinkerbellmachine object no longer exists, allow the tinkerbellmachine object to be removed and clean up associated template and workflow. This means BMC operations to power the machine off and modify the Hardware object will all be skipped.
While the tinkerbellmachine object can be deleted if the finalizer is removed manually this improves the user experience.
Why is this needed
Fixes: #368
How Has This Been Tested?
How are existing users impacted? What migration steps/scripts do we need?
Checklist:
I have: