Changes

fix(tekton/v0/tasks,tekton/v1/tasks): allow release suffix in tag regex when clean git tags (#3823)

This pull request updates the logic for filtering git tags in the Tekton
pipeline task scripts to include the `release` tag variant as a
recognized standard. This change ensures that tags matching the
`release` pattern are preserved and not deleted as non-standard tags.

Tag filtering logic update:

* In both `tekton/v0/tasks/pingcap-get-set-release-version-v2.yaml` and
`tekton/v1/tasks/pingcap-get-set-release-version-v2.yaml`, the regular
expression used to identify standard semver tags now includes the
`release` variant, preventing accidental deletion of tags such as
`v1.2.3-release`.
[[1]](diffhunk://#diff-9904c8dfc5da304d83fed6591586b52d82f83f304bd7641f083791d98fb20451L43-R43)
[[2]](diffhunk://#diff-73a92c7100c05352eb4ee75aaa7114a55cb9ef1ef978218f79bc2b9ad422dbacL44-R44)
 (commit: 62bede7)