chore: Trigger TBP on pg for scheduled run on release (#36399)

## Description
We want to trigger TBP workflow on pg on a scheduled basis similar to
what we have for release branch to be aware of failures on pg branch
because of the continuous merges from release. We searched if scheduled
job can be triggered for non default branch but that is not possible.
With this PR we are adding a job in the workflow to trigger the
`workflow_dispatch` event with ref to pg branch. Other options which we
may want to explore is [reusable
workflows](https://docs.github.com/en/actions/sharing-automations/reusing-workflows).

/test sanity

### 🔍 Cypress test results
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> If you modify the content in this section, you are likely to disrupt
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## Communication
Should the DevRel and Marketing teams inform users about this change?
- [ ] Yes
- [x] No


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

## Summary by CodeRabbit

- **New Features**
- Introduced a new job for handling PostgreSQL workflows during release
events.
- **Changes**
	- Removed the `is-pg-build` parameter from the build workflow.
- Simplified the CI process by limiting job triggers to the `master`
branch.

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

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

@@ -9,11 +9,6 @@ on:
         description: "This is the PR number in case the workflow is being called in a pull request"
         required: false
         type: number
-      is-pg-build:
-        description: "This is a boolean value in case the workflow is being called for a PG build"
-        required: false
-        type: string
-        default: "false"
 
 jobs:
   build-docker:

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

@@ -23,7 +23,7 @@ on:
 
   # trigger for pushes to master and pg
   push:
-    branches: [master, pg]
+    branches: [master]
     paths:
       - "app/client/**"
       - "app/server/**"
@@ -59,6 +59,14 @@ 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'
+    uses: benc-uk/workflow-dispatch@v1
+    with:
+      workflow: test-build-docker-image.yml
+      inputs: '{ "ref": "pg"}'
+
   server-build:
     needs: [setup]
     if: success()
@@ -100,7 +108,7 @@ jobs:
   ci-test:
     needs: [setup, build-docker-image]
     # Only run if the build step is successful
-    if: success() && ( github.event_name != 'push' || github.ref == 'refs/heads/master' || github.ref == 'refs/heads/pg' )
+    if: success() && ( github.event_name != 'push' || github.ref == 'refs/heads/master')
     name: ci-test
     uses: ./.github/workflows/ci-test-custom-script.yml
     secrets: inherit
@@ -113,17 +121,18 @@ jobs:
   server-unit-tests:
     name: server-unit-tests
     needs: [build-docker-image]
-    if: success() && ( github.event_name != 'push' || github.ref == 'refs/heads/master' || github.ref == 'refs/heads/pg' )
+    if: success() && ( github.event_name != 'push' || github.ref == 'refs/heads/master')
     uses: ./.github/workflows/server-build.yml
     secrets: inherit
     with:
       pr: 0
       skip-tests: false
+      is-pg-build: ${{ github.ref == 'refs/heads/pg' }}
 
   client-unit-tests:
     name: client-unit-tests
     needs: [build-docker-image]
-    if: success() && ( github.event_name != 'push' || github.ref == 'refs/heads/master' || github.ref == 'refs/heads/pg' )
+    if: success() && ( github.event_name != 'push' || github.ref == 'refs/heads/master')
     uses: ./.github/workflows/client-unit-tests.yml
     secrets: inherit
     with: