Cherrypick #38066

Author: Amar3tto

.github/workflows/beam_PostCommit_Python_Xlang_Gcp_Dataflow.yml

@@ -81,7 +81,9 @@ jobs:
         uses: ./.github/actions/gradle-command-self-hosted-action
         with:
           gradle-command: :sdks:python:test-suites:dataflow:gcpCrossLanguagePostCommit
-          arguments: -PuseWheelDistribution
+          arguments: |
+            -PpythonVersion=3.14 \
+            -PuseWheelDistribution \
       - name: Archive Python Test Results
         uses: actions/upload-artifact@v4
         if: failure()

.github/workflows/beam_PostCommit_Python_Xlang_IO_Dataflow.yml

@@ -81,6 +81,7 @@ jobs:
         with:
           gradle-command: :sdks:python:test-suites:dataflow:ioCrossLanguagePostCommit
           arguments: |
+            -PpythonVersion=3.14 \
             -PuseWheelDistribution \
             -PkafkaBootstrapServer=10.128.0.40:9094,10.128.0.28:9094,10.128.0.165:9094 \
       - name: Archive Python Test Results
@@ -96,4 +97,4 @@ jobs:
           commit: '${{ env.prsha || env.GITHUB_SHA }}'
           comment_mode: ${{ github.event_name == 'issue_comment'  && 'always' || 'off' }}
           files: '**/pytest*.xml'
-          large_files: true
+          large_files: true