Fix PostCommit Python ValidatesContainer Dataflow With RC job (#35556)

Fix PostCommit Python ValidatesContainer Dataflow With RC job

Author: Amar3tto

.github/workflows/beam_PostCommit_Python_ValidatesContainer_Dataflow_With_RC.yml

@@ -56,7 +56,7 @@ jobs:
       github.event_name == 'pull_request_target' ||
       startsWith(github.event.comment.body, 'Run Python RC Dataflow ValidatesContainer')
     runs-on: [self-hosted, ubuntu-20.04, main]
-    timeout-minutes: 100
+    timeout-minutes: 300
     name: ${{ matrix.job_name }} (${{ matrix.job_phrase }} ${{ matrix.python_version }})
     strategy:
       fail-fast: false
@@ -74,6 +74,8 @@ jobs:
           github_job: ${{ matrix.job_name }} (${{ matrix.job_phrase }} ${{ matrix.python_version }})
       - name: Install libsnappy-dev
         run: sudo apt-get update && sudo apt-get install -y libsnappy-dev
+      - name: Install libpq-dev
+        run: sudo apt-get update && sudo apt-get install -y libpq-dev
       - name: Setup environment
         uses: ./.github/actions/setup-environment-action
         with: