[release-v0.62.x] Backport release "scripts" changes from main…

[vdemeester]

Changes

… as we switch to ghcr.io, we need those to be updated to work as they are referered during releases.

Related PRs

• Make image registry regions configurable #8246
• Add OCI source label to images #8247
• Support separate bucket and image reg creds #8251
• Run build and tests conditionally #8252
• Fix the imageRegistryUser param usage in the release pipeline #8256
• Propagate image registry regions to publish #8259
• Add KO_EXTRA_ARGS #8260
• Adapt koparse step to handle no import path #8261
• Use the new version of koparse in the build #8278
• Simply the path for the base image #8290
• Update the release cheat-sheet #8302

/assign @afrittoli
/kind misc

Submitter Checklist

As the author of this PR, please check off the items in this checklist:

• Has Docs if any changes are user facing, including updates to minimum requirements e.g. Kubernetes version bumps
• Has Tests included if any functionality added or changed
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• Release notes contains the string "action required" if the change requires additional action from users switching to the new release

Release Notes

NONE

[vdemeester]

/kind misc

[afrittoli]

It looks good, thank you!

[afrittoli]

/approve

[tekton-robot]

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