Revert "Bump actions/setup-python from 4 to 6 (#36277)" (#36427)

This reverts commit 7b03da9.

Author: damccorm

.github/workflows/beam_Infrastructure_PolicyEnforcer.yml

@@ -45,7 +45,7 @@ jobs:
       - uses: actions/checkout@v4
 
       - name: Setup Python
-        uses: actions/setup-python@v6
+        uses: actions/setup-python@v4
         with:
           python-version: '3.13'
 

.github/workflows/beam_Infrastructure_SecurityLogging.yml

@@ -47,7 +47,7 @@ jobs:
       - uses: actions/checkout@v4
 
       - name: Setup Python
-        uses: actions/setup-python@v6
+        uses: actions/setup-python@v4
         with:
           python-version: '3.13'
 

.github/workflows/beam_Infrastructure_ServiceAccountKeys.yml

@@ -53,7 +53,7 @@ jobs:
         uses: google-github-actions/setup-gcloud@v3
 
       - name: Setup Python
-        uses: actions/setup-python@v6
+        uses: actions/setup-python@v4
         with:
           python-version: '3.13'
 

.github/workflows/build_release_candidate.yml

@@ -281,7 +281,7 @@ jobs:
           distribution: 'temurin'
           java-version: '11'
       - name: Install Python 3.9
-        uses: actions/setup-python@v6
+        uses: actions/setup-python@v5
         with:
           python-version: '3.9'
       - name: Set up Docker Buildx
@@ -327,7 +327,7 @@ jobs:
           token: ${{ github.event.inputs.REPO_TOKEN }}
           ref: release-docs
       - name: Install Python 3.9
-        uses: actions/setup-python@v6
+        uses: actions/setup-python@v5
         with:
           python-version: '3.9'
       - name: Install node
@@ -566,7 +566,7 @@ jobs:
           token: ${{ github.event.inputs.REPO_TOKEN }}
           persist-credentials: false
       - name: Install Python 3.9
-        uses: actions/setup-python@v6
+        uses: actions/setup-python@v5
         with:
           python-version: '3.9'
       - name: Install Java 11

.github/workflows/build_wheels.yml

@@ -90,7 +90,7 @@ jobs:
       - name: Checkout code
         uses: actions/checkout@v4
       - name: Install python
-        uses: actions/setup-python@v6
+        uses: actions/setup-python@v5
         with:
           python-version: 3.9
       - name: Get tag
@@ -244,7 +244,7 @@ jobs:
         name: source_rc${{ needs.build_source.outputs.rc_num }}
         path: apache-beam-source-rc
     - name: Install Python
-      uses: actions/setup-python@v6
+      uses: actions/setup-python@v5
       with:
         python-version: 3.9
     - uses: docker/setup-qemu-action@v3

.github/workflows/dask_runner_tests.yml

@@ -42,7 +42,7 @@ jobs:
       - name: Checkout code
         uses: actions/checkout@v4
       - name: Install python
-        uses: actions/setup-python@v6
+        uses: actions/setup-python@v5
         with:
           python-version: 3.9
       - name: Build source
@@ -72,7 +72,7 @@ jobs:
       - name: Checkout code
         uses: actions/checkout@v4
       - name: Install python
-        uses: actions/setup-python@v6
+        uses: actions/setup-python@v5
         with:
           python-version: ${{ matrix.params.py_ver }}
       - name: Install tox

.github/workflows/flaky_test_detection.yml

@@ -39,7 +39,7 @@ jobs:
     runs-on: [self-hosted, ubuntu-20.04, main]
     steps:
       - uses: actions/checkout@v4
-      - uses: actions/setup-python@v6
+      - uses: actions/setup-python@v5
         with: 
           python-version: 3.11
       - run: pip install PyGithub

.github/workflows/python_dependency_tests.yml

@@ -38,7 +38,7 @@ jobs:
       - name: Install libsnappy-dev
         run: sudo apt-get update && sudo apt-get install -y libsnappy-dev
       - name: Install python
-        uses: actions/setup-python@v6
+        uses: actions/setup-python@v5
         with:
           python-version: ${{ matrix.params.py_ver }}
       - name: Install base_image_requirements.txt

.github/workflows/refresh_looker_metrics.yml

@@ -38,7 +38,7 @@ jobs:
     runs-on: [self-hosted, ubuntu-20.04, main]
     steps:
       - uses: actions/checkout@v4
-      - uses: actions/setup-python@v6
+      - uses: actions/setup-python@v5
         with:
           python-version: 3.11
       - run: pip install requests google-cloud-storage looker-sdk

.github/workflows/republish_released_docker_containers.yml

@@ -68,7 +68,7 @@ jobs:
           distribution: 'temurin'
           java-version: '11'
       - name: Install Python 3.9
-        uses: actions/setup-python@v6
+        uses: actions/setup-python@v5
         with:
           python-version: '3.9'
       - name: Authenticate on GCP