William Lallemand fc38ebb079 CI: github: treat vX.Y.Z release tags as stable like haproxy-* branches
Add detection of release tags matching the vX.Y.Z pattern so they use
the same stable CI configuration as haproxy-* branches, rather than the
development one.

It prevents stable tag to trigger the CI with docker images and SSL
libraries only used for development.

Must be backported in stable releases.
2026-03-19 15:58:24 +01:00
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