Add support for Python 3.11 (#33505)

Argparse started raising ArgumentError exceptions
when the same parser is added twice. Therefore, we
perform the addition only if the parser is not there
already

Port match syntax to our unparser

.github/workflows/valid-style.yml

@@ -21,7 +21,7 @@ jobs:
     - uses: actions/checkout@93ea575cb5d8a053eaa0ac8fa3b40d7e05a33cc8 # @v2
     - uses: actions/setup-python@13ae5bb136fac2878aff31522b9efb785519f984 # @v2
       with:
-        python-version: '3.10'
+        python-version: '3.11'
         cache: 'pip'
     - name: Install Python Packages
       run: |
@@ -40,7 +40,7 @@ jobs:
         fetch-depth: 0
     - uses: actions/setup-python@13ae5bb136fac2878aff31522b9efb785519f984 # @v2
       with:
-        python-version: '3.10'
+        python-version: '3.11'
         cache: 'pip'
     - name: Install Python packages
       run: |
@@ -57,4 +57,4 @@ jobs:
     uses: ./.github/workflows/audit.yaml
     with:
       with_coverage: ${{ inputs.with_coverage }}
-      python_version: '3.10'
+      python_version: '3.11'