Increase timeouts (#38301)

Author: Amar3tto

.github/workflows/beam_PostCommit_Python_Arm.yml

@@ -54,7 +54,7 @@ jobs:
   beam_PostCommit_Python_Arm:
     name: ${{ matrix.job_name }} ${{ matrix.python_version }}
     runs-on: ubuntu-22.04
-    timeout-minutes: 240
+    timeout-minutes: 480
     strategy:
       fail-fast: false
       matrix:

.github/workflows/beam_PostCommit_Python_Xlang_Gcp_Dataflow.yml

@@ -57,7 +57,7 @@ jobs:
       (github.event_name == 'schedule' && github.repository == 'apache/beam') ||
       github.event.comment.body == 'Run Python_Xlang_Gcp_Dataflow PostCommit'
     runs-on: [self-hosted, ubuntu-24.04, main]
-    timeout-minutes: 240
+    timeout-minutes: 480
     name: ${{ matrix.job_name }} (${{ matrix.job_phrase }})
     strategy:
       matrix: