chore: change ghcr.io/distroless/* to distroless.dev/*

[imjasonh]

At this time, distroless.dev/static simply redirects to
ghcr.io/distroless/static, so this is effectively no change.

However, we are evaluating renaming the github.com/distroless org to
avoid confusion, and in doing so, images at ghcr.io/distroless may be
disrupted. Using the distroless.dev redirector gives us flexibility to
change the underlying image registry transparently.

The redirector code for distroless.dev is open source at
https://github.com/chainguard-dev/registry-redirect and we've used it
extensively internally for a month or two with no serious issues.

Any credentials that are used are not logged or stored by the
redirector, and since the image in question is public anyway, any
credentials that pass through the redirector have no elevated
permissions.

/kind cleanup

Submitter Checklist

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

• Has Docs included if any changes are user facing
• Has Tests included if any functionality added or changed
• Follows the commit message standard
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  functionality, content, code)
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Release Notes

Images are based on distroless.dev/* instead of the (equivalent) ghcr.io/distroless/* -- no effective behavior change

PR friction log:

• release-note space shenanigans ❌
• TestPipelineRunTimeout failed on integration tests and alpha integration tests, retried ❌

[imjasonh]

/test pull-tekton-pipeline-integration-tests
/test pull-tekton-pipeline-alpha-integration-tests

[tekton-robot]

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[abayer]

/lgtm