Registry client: option to cleanup old timestamped catalog artifacts

[aloubyansky]

Adds a config option to the Maven registry client to clean up old registry artifacts with timestamps from the local repo, which is on by default. It can be disabled in the .quarkus/config.yaml, e.g.

registries:
- playground.io:
    cleanup-timestamped-artifacts: false
    update-policy: "always"
    maven:
      repository:
        url: http://localhost:8080/registry

[gastaldi]

LGTM

[quarkus-bot]

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