disable experimental attestations and fail fast only for automatic re…

…leases

PiperOrigin-RevId: 707874126
Change-Id: Icbffa4410bd83ef3bbe27407ee513654055da9da

.github/workflows/pypi-publish.yml

@@ -60,7 +60,7 @@ jobs:
       SYSTEM_VERSION_COMPAT: 0  # See https://github.com/actions/setup-python/issues/279.
     timeout-minutes: 180
     strategy:
-      fail-fast: false
+      fail-fast: ${{ github.event_name == 'release' }}
       matrix:
         os:
           - macos-13
@@ -116,10 +116,12 @@ jobs:
         if: github.event_name == 'release' || inputs.upload_to_test_pypi
         uses: pypa/gh-action-pypi-publish@67339c736fd9354cd4f8cb0b744f2b82a74b5c70
         with:
+          attestations: false
           repository-url: https://test.pypi.org/legacy/
           verbose: true
       - name: Publish to PyPI
         if: github.event_name == 'release' || inputs.upload_to_pypi
         uses: pypa/gh-action-pypi-publish@67339c736fd9354cd4f8cb0b744f2b82a74b5c70
         with:
+          attestations: false
           verbose: true