chore: Remove auto trigger TBPs on pg branch (#39607)

<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->

## Summary by CodeRabbit

- **Chores**
- Streamlined the automated build and testing process by removing an
obsolete workflow trigger, enhancing overall efficiency.

<!-- end of auto-generated comment: release notes by coderabbit.ai -->

.github/workflows/test-build-docker-image.yml

@@ -59,18 +59,6 @@ jobs:
             echo "matrix=[0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59]" >> $GITHUB_OUTPUT
           fi
 
-  invoke-tbp-workflow-for-pg:
-    needs: [setup]
-    if: github.event_name != 'push' && github.ref == 'refs/heads/release'
-    runs-on: ubuntu-latest
-    steps:
-      - name: Trigger TBP on pg branch
-        uses: benc-uk/workflow-dispatch@v1
-        with:
-          workflow: test-build-docker-image.yml
-          inputs: '{ "tags": "${{needs.setup.outputs.tags}}", "ted_tag": "${{inputs.ted_tag}}" }'
-          ref: refs/heads/pg
-
   server-build:
     needs: [setup]
     if: success()