CI: rename codegen workflow to be more generic

Also remove the python setup stage as it shouldn't be necessary any more
seen that bazel uses a specific bundled one.

.github/workflows/python-tooling.yml

@@ -1,10 +1,11 @@
-name: Codegen
+name: Python tooling
 
 on:
   pull_request:
     paths:
       - "misc/bazel/**"
       - "misc/codegen/**"
+      - "misc/scripts/models-as-data/bulk_generate_mad.py"
       - "*.bazel*"
       - .github/workflows/codegen.yml
       - .pre-commit-config.yaml
@@ -17,13 +18,10 @@ permissions:
   contents: read
 
 jobs:
-  codegen:
+  check-python-tooling:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
-      - uses: actions/setup-python@v4
-        with:
-          python-version-file: 'misc/codegen/.python-version'
       - uses: pre-commit/action@646c83fcd040023954eafda54b4db0192ce70507
         name: Check that python code is properly formatted
         with: