switch GCR -> Artifact-Registry

[ccwienk]

GCR has been deprecated [0] in favour of Artifact-Registry.

Thus, change push-targets for OCI-Images:

• europe-docker.pkg.dev/gardener-project/snapshots for snapshots
• europe-docker.pkg.dev/gardener-project/releases for releases
• europe-docker.pkg.dev/gardener-project/public for combined view of snapshots + releases

[0]
https://cloud.google.com/artifact-registry/docs/transition/transition-from-gcr

Release note:

Change OCI Image Registry from GCR (`eu.gcr.io/gardener-project`) to Artifact-Registry (`europe-docker.pkg.dev/gardener-project/releases`). Users should update their references.

[ccwienk]

could you advice about the error about missing gomega:

github.com/gardener/gardener/hack/tools/gomegacheck@latest: module github.com/gardener/gardener@latest found (v1.85.0), but does not contain package github.com/gardener/gardener/hack/tools/gomegacheck

I cannot see how this might be related to my change 🤔

[gardener-prow]

@ccwienk: The following test failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
pull-dependency-watchdog-check-vulnerabilities	b462b90	link	false	/test pull-dependency-watchdog-check-vulnerabilities

Full PR test history. Your PR dashboard. Command help for this repository.
Please help us cut down on flakes by linking this test failure to an open flake report or filing a new flake report if you can't find an existing one. Also see our testing guideline for how to avoid and hunt flakes.

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[ccwienk]

according to failed check, there seem to be dependencies that should be updated:

Your code is affected by 6 vulnerabilities from the Go standard library.

however, considering this is not related to this pull-request, I assume it may be ignored in the context of this pull-request.

[ccwienk]

related: gardener/ci-infra#1067

also: bump

[rishabh-11]

/lgtm

[gardener-prow]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: rishabh-11

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[gardener-prow]

LGTM label has been added.

Git tree hash: e05c33dc8480f032bb5e92afb48973dc92d05f40