Finish consolidating the python setup steps (openshift-helm-charts#419)

Signed-off-by: Matthias Goerens <[email protected]>

Author: mgoerens

.github/workflows/build.yml

@@ -216,10 +216,8 @@ jobs:
           repository: ${{ github.event.pull_request.head.repo.full_name }}
           path: "pr-branch"
 
-      - name: Set up Python 3.x Part 1
-        uses: actions/setup-python@v5
-        with:
-          python-version: "3.10"
+      - name: Set up Python
+        uses: ./.github/actions/setup-python
 
       - name: Set up Python 3.x Part 2
         run: |
@@ -411,10 +409,8 @@ jobs:
           repository: ${{ github.event.pull_request.head.repo.full_name }}
           path: "pr-branch"
 
-      - name: Set up Python 3.x Part 1
-        uses: actions/setup-python@v5
-        with:
-          python-version: "3.10"
+      - name: Set up Python
+        uses: ./.github/actions/setup-python
 
       - name: Set up Python 3.x Part 2
         run: |