🐛 PreprovisioningImage should not be created on poweroff before delete

[jgato]

PreprovisioningImage not created on poweroff

What this PR does / why we need it:

There is a new state StatePoweringOffBeforeDelete
that should not create the PreprovisioningImage.

This new state comes from a previous one called
StateDeleting that was contemplated about
not creating the PreprovisioningImage.

Just added the new state to nor create the image.

Tested with the changes over release 4.14 on an OCP4.14 cluster. I dont think it should be different on higher versions. Suggestions?

Which issue(s) this PR fixes (optional, in fixes #<issue number>(, fixes #<issue_number>, ...) format, will close the issue(s) when PR gets merged):
Fixes #

[metal3-io-bot]

Hi @jgato. Thanks for your PR.

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[dtantsur]

/ok-to-test

[dtantsur]

/approve
/test metal3-bmo-e2e-test-pull
/test metal3-centos-e2e-integration-test-main

[metal3-io-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: dtantsur

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[zaneb]

/lgtm