[ROCm] Add release pipeline CI workflows
- Add compute-post-suffix job to wheel_tests_rocm_release.yml for
auto-detecting .postN versions from PyPI
- Add wheel-version-suffix input for manual override
- Update S3 paths to use release-validation/ convention with
github.repository prefix, matching the layout from
wheel_release_validation_rocm.yml
- Update rocm_release_publish.yml to read from the new
release-validation/ path and add repository input
- Remove rocm_release_promote_gate.yml (gate pin no longer needed)
Co-authored-by: tsrw2048 <239799652+tsrw2048@users.noreply.github.com>
