feat: use file based OLM catalog

[raelga]

This pull request includes significant changes to the GitHub Actions workflow and the Makefile for the prometheus-exporter-operator project. The changes primarily focus on improving the release process, containerization, and metadata management.

GitHub Actions Workflow Improvements:

• Updated the trigger for the release workflow to run on tags matching the pattern v* instead of branches. (.github/workflows/release.yaml)
• Added steps to set up Docker metadata, QEMU, and Docker Buildx, and updated the build and push steps to use these new configurations, adding support for ARM64 and AMD64 architectures. (.github/workflows/release.yaml)

Makefile Enhancements:

• Introduced environment variable handling for versioning when running in GitHub Actions. (Makefile)
• Replaced docker-build and docker-push targets with container-build and container-push to support multiple architectures using Docker Buildx. (Makefile)
• Added new targets for managing catalog entries and validating the catalog. (Makefile)
• Updated the bundle-build and bundle-push targets to use the new container build process. (Makefile)
• Improved bundle catalog manifest generation to inherit alpha and stable releases from $VERSION. Makefile)

Metadata and Dockerfile Updates:

• Updated bundle and catalog Dockerfiles to align with the new build process and metadata requirements. (bundle.Dockerfile, catalog/Dockerfile) [1] [2]
• Adjusted metadata annotations to reflect the new versioning and channel configurations. (bundle/metadata/annotations.yaml)

File based OLM catalog

• Updates the catalog workflow with the latest iteration of OLM’s catalog format

These changes collectively enhance the automation, compatibility, consistency, and reliability of the release process for the prometheus-exporter-operator project.

Notes

/kind feature
/priority important-longterm
/assign

[slopezz]

why this change?

Right now it was pretty easy as documented at https://github.com/3scale-ops/prometheus-exporter-operator/blob/main/docs/release.md#stable, you dont need to add any manual tag
..., you change the bundle files... and if the GH action detect there is a change on the version, execute the release process

[raelga]

Release file has been removed, will be implemented in the next PR as discussed internally.

[3scale-robot]

LGTM label has been added.

Git tree hash: 638052fedc306905c33085ccdc36528eac3efc72

[raelga]

/approve

[3scale-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: raelga

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