Revert "Migrate pilot workflows to ubuntu-24.04 self-hosted pools (#37995)" (#37998)

This reverts commit c4638a3.

Author: aIbrahiim

.github/workflows/beam_PreCommit_PythonLint.yml

@@ -57,7 +57,7 @@ env:
 jobs:
   beam_PreCommit_PythonLint:
     name: ${{ matrix.job_name }} (${{ matrix.job_phrase }})
-    runs-on: [self-hosted, ubuntu-24.04, main]
+    runs-on: [self-hosted, ubuntu-20.04, main]
     strategy:
       matrix:
         job_name: [beam_PreCommit_PythonLint]

.github/workflows/beam_PreCommit_RAT.yml

@@ -56,7 +56,7 @@ env:
 jobs:
   beam_PreCommit_RAT:
     name: ${{ matrix.job_name }} (${{ matrix.job_phrase }})
-    runs-on: [self-hosted, ubuntu-24.04, small]
+    runs-on: [self-hosted, ubuntu-20.04, small]
     strategy:
       matrix:
         job_name: [beam_PreCommit_RAT]

.github/workflows/beam_PreCommit_Whitespace.yml

@@ -57,7 +57,7 @@ env:
 jobs:
   beam_PreCommit_Whitespace:
     name: ${{ matrix.job_name }} (${{ matrix.job_phrase }})
-    runs-on: [self-hosted, ubuntu-24.04, small]
+    runs-on: [self-hosted, ubuntu-20.04, small]
     strategy:
       matrix:
         job_name: [beam_PreCommit_Whitespace]

.github/workflows/go_tests.yml

@@ -36,7 +36,7 @@ concurrency:
   cancel-in-progress: true
 jobs:
   build:
-    runs-on: [self-hosted, ubuntu-24.04, main]
+    runs-on: [self-hosted, ubuntu-20.04, main]
     name: Go Build
     steps:
       - name: Check out code

.github/workflows/typescript_tests.yml

@@ -51,7 +51,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: [[self-hosted, ubuntu-24.04], macos-latest]
+        os: [[self-hosted, ubuntu-20.04], macos-latest]
     steps:
       - name: Check out code
         uses: actions/checkout@v4
@@ -77,7 +77,7 @@ jobs:
         working-directory: ./sdks/typescript
         env:
           NODE_OPTIONS: '-r @gradle-tech/develocity-agent/preload'
-        if: contains(matrix.os, 'ubuntu-24.04')
+        if: contains(matrix.os, 'ubuntu-20.04')
 #      - run: npm run codecovTest
 #        working-directory: ./sdks/typescript
 #        if: ${{ matrix.os == 'ubuntu-latest' }}
@@ -90,7 +90,7 @@ jobs:
     name: 'TypeScript xlang Tests'
     # TODO(https://github.com/apache/beam/issues/33346): remove manual trigger after fixing referenced issue.
     if: (github.event_name == 'workflow_dispatch' && github.event.inputs.runXlang == 'true')
-    runs-on: [self-hosted, ubuntu-24.04]
+    runs-on: [self-hosted, ubuntu-20.04]
     timeout-minutes: 15
     strategy:
       fail-fast: false