chore: fix missing setuptools in CI (#3189)

Install `setuptools` in addition to `wheel` before trying to run
`python setup.py` manually.

Note that `setuptools` is already correctly listed in the
`pyproject.toml` file for consumers installing via `pip` etc, but
in CI the file is run directly to generate `sdist` and `bdist_wheel`
artifacts for PyPI.

Signed-off-by: Milas Bowman <milas.bowman@docker.com>

.github/workflows/release.yml

@@ -28,7 +28,7 @@ jobs:
 
       - name: Generate Pacakge
         run: |
-          pip3 install wheel
+          pip3 install setuptools wheel
           python setup.py sdist bdist_wheel
         env:
           SETUPTOOLS_SCM_PRETEND_VERSION_FOR_DOCKER: ${{ inputs.tag }}