chore: Ability to run PR automations every time PR updates (#35476)

## Description

By changing the workflow trigger and the way to check for correct
labels, we are trying to allow the PR integrations tests to run every
time the PR is updated. That means, if you push changes, and the PR
already has ok-to-test label, it will rerun the tests based on new
changes



## Automation

/ok-to-test tags="@tag.Sanity"

### 🔍 Cypress test results
<!-- This is an auto-generated comment: Cypress test results  -->
> [!TIP]
> 🟢 🟢 🟢 All cypress tests have passed! 🎉 🎉 🎉
> Workflow run:
<https://github.com/appsmithorg/appsmith/actions/runs/10296910575>
> Commit: c59583ba28c8cdff35a12422b8c73838c6efdc85
> <a
href="https://internal.appsmith.com/app/cypress-dashboard/rundetails-65890b3c81d7400d08fa9ee5?branch=master&workflowId=10296910575&attempt=1"
target="_blank">Cypress dashboard</a>.
> Tags: `@tag.Sanity`
> Spec:
> <hr>Thu, 08 Aug 2024 06:32:48 UTC
<!-- end of auto-generated comment: Cypress test results  -->


## Communication
Should the DevRel and Marketing teams inform users about this change?
- [ ] Yes
- [ ] No


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

- **New Features**
- Introduced a new job, `checkTestLabel`, to verify the presence of the
"ok-to-test" label on pull requests.
- Added a new job, `mark-stale`, to mark the Cypress status as stale
when the label is absent.
- **Improvements**
- Updated the `parse-tags` job to run only after the `checkTestLabel`
job, enhancing workflow control.
- Modified the conditions for executing the `parse-tags` job based on
the output of the `checkTestLabel` job.
- **Style**
	- Minor formatting adjustments for job dependencies in the workflow.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->

.github/workflows/pr-automation.yml

@@ -1,17 +1,68 @@
 name: PR Automation test suite
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
+  cancel-in-progress: true
+
 on:
   pull_request:
     branches:
       - release
       - pg
-    types:
+    types: [ labeled, synchronize ]
-      - labeled
 
 jobs:
-  parse-tags:
+  checkTestLabel:
+    runs-on: ubuntu-latest
+    outputs:
+      ok_to_test: ${{ steps.checkLabel.outputs.ok_to_test }}
+    steps:
+
+      - name: Check PR Label
+        id: checkLabel
+        uses: actions/github-script@v7
+        with:
+          # This script will check if the PR has ok-to-test label.
+          # To avoid being dependent on the event which triggered this workflow,
+          # we will always get the pull request labels directly from the context
+          # It will later set the output to be "true" or "false".
+          script: |
+            const labels = context.payload.pull_request.labels.map(label => label.name);
+            if (labels.includes("ok-to-test")) {
+              console.log("Label 'ok-to-test' is present");
+              core.setOutput("ok_to_test", "true");
+            } else {
+              console.log("Label 'ok-to-test' is not present");
+              core.setOutput("ok_to_test", "false");
+            }
+
+  mark-stale:
+    needs: [ checkTestLabel ]
+    if: needs.checkTestLabel.outputs.ok_to_test == 'false'
+    runs-on: ubuntu-latest
+    permissions:
+      pull-requests: write
+    defaults:
+      run:
+        shell: bash
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+      # In case of a no label present, mark the Cypress status to be stale
+      - name: Mark the Cypress response to be stale
+        uses: actions/github-script@v7
+        env:
+          NODE_PATH: "${{ github.workspace }}/.github/workflows/scripts"
+          BODY: |
+            Tests have not run on the HEAD ${{ github.event.pull_request.head.sha }} yet
+        with:
+          script: |
+            require("write-cypress-status.js")({core, context, github}, "warning", process.env.BODY)
+
+  parse-tags:
+    needs: [ checkTestLabel ]
+    if: needs.checkTestLabel.outputs.ok_to_test == 'true'
     runs-on: ubuntu-latest
-    if: github.event.label.name == 'ok-to-test'
     permissions:
       pull-requests: write
     defaults:
@@ -27,7 +78,7 @@ jobs:
       - name: Checkout the head commit of the branch
         uses: actions/checkout@v4
         with:
-            repository: appsmithorg/appsmith
+          repository: appsmithorg/appsmith
 
       # Reads the PR description to retrieve the /ok-to-test or, if that's absent, the /test command
       - name: Read tags from PR description
@@ -72,7 +123,7 @@ jobs:
 
   # Call the workflow to run Cypress tests
   perform-test:
-    needs: [parse-tags]
+    needs: [ parse-tags ]
     if: success()
     uses: ./.github/workflows/pr-cypress.yml
     secrets: inherit