No need to build and push the Docker images on each PR and commit

[ludovicm67]

This PR does the following:

• only build and push Docker images on semver tag
• run tests on each commit (this will also build the Docker image for the default arch, in order to run tests)

[changeset-bot]

⚠️ No Changeset found

Latest commit: c876fe8

Merging this PR will not cause a version bump for any packages. If these changes should not result in a new version, you're good to go. If these changes should result in a version bump, you need to add a changeset.

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