feat: [artifactregistry] add format-specific resources `MavenArtifact`, `NpmPackage`, `KfpArtifact` and `PythonPackage`#9080

Merged

emmileaf merged 2 commits intomainfrom owl-bot-copy-java-artifact-registry

Feb 15, 2023

+30,876-677

Commits on Feb 3, 2023

feat: add format-specific resources MavenArtifact, NpmPackage, KfpArtifact and PythonPackage
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🦉 Updates from OwlBot post-processor
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