chore: 2nd try - simplify python dependencies (#27505)

.github/workflows/superset-python-misc.yml

@@ -38,21 +38,10 @@ jobs:
         continue-on-error: true
         run: ./scripts/ci_check_no_file_changes.sh python
       - name: Setup Python
+        uses: ./.github/actions/setup-backend/
         if: steps.check.outcome == 'failure'
-        uses: actions/setup-python@v5
         with:
           python-version: ${{ matrix.python-version }}
-          cache: "pip"
-          cache-dependency-path: "requirements/testing.txt"
-      - name: Install dependencies
-        if: steps.check.outcome == 'failure'
-        uses: ./.github/actions/cached-dependencies
-        with:
-          run: |
-            apt-get-install
-            pip-upgrade
-            pip install wheel
-            pip install -r requirements/testing.txt
       - name: pylint
         if: steps.check.outcome == 'failure'
         # `-j 0` run Pylint in parallel
@@ -70,18 +59,8 @@ jobs:
           persist-credentials: false
           submodules: recursive
       - name: Setup Python
-        uses: actions/setup-python@v5
+        uses: ./.github/actions/setup-backend/
         with:
           python-version: ${{ matrix.python-version }}
-          cache: "pip"
-          cache-dependency-path: "requirements/base.txt"
-      - name: Install dependencies
-        uses: ./.github/actions/cached-dependencies
-        with:
-          run: |
-            apt-get-install
-            pip-upgrade
-            pip install wheel
-            pip install -r requirements/base.txt
       - name: Test babel extraction
         run: flask fab babel-extract --target superset/translations --output superset/translations/messages.pot --config superset/translations/babel.cfg -k _,__,t,tn,tct