Earlier branch: Run release environments on every RC pipeline

Context

Previously, the release environments were configured to only run on the initial RC (RC42), #21267 (comment 2597470348). However, the release tooling automation relies on the release environment status to determine if the stable branch is ready for a release. Not having release environments available on later release candidates causes the release automation to fail.

Run release environments on every RC pipeline.

The release environment configuration needs to be adjusted to run on every RC, not just the initial one. See #21212 (comment 2696799410) for details.