ci: Uses TiddlyWiki/cerebrus@v5, and replaces obsolete workflow (#9423)

* refactor: use TiddlyWiki/cerebrus@v5, and rename yml

* continue-on-error: false

* Update .github/workflows/pr-validation.yml to restrict contents permissions

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

---------

Co-authored-by: Saq Imtiaz <saq.imtiaz@gmail.com>
Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

.github/workflows/pr-check-build-size.yml

@@ -20,7 +20,7 @@ jobs:
     steps:
     - name: build-size-check
       id: get_sizes
-      uses: TiddlyWiki/cerebrus@v4
+      uses: TiddlyWiki/cerebrus@v5
       with:
         pr_number: ${{ github.event.pull_request.number }}
         repo: ${{ github.repository }}

.github/workflows/pr-comment-build-size.yml

@@ -25,7 +25,7 @@ jobs:
 
     steps:
     - name: Build and check size
-      uses: TiddlyWiki/cerebrus@v4
+      uses: TiddlyWiki/cerebrus@v5
       with:
         pr_number: ${{ inputs.pr_number }}
         repo: ${{ github.repository }}

.github/workflows/pr-path-validation.yml

@@ -1,18 +0,0 @@
-name: Validate PR Paths
-
-on:
-  pull_request_target:
-    types: [opened, reopened, synchronize]
-
-jobs:
-  validate-pr:
-    runs-on: ubuntu-latest
-
-    steps:
-    - name: Validate PR
-      uses: TiddlyWiki/cerebrus@v4
-      with:
-        pr_number: ${{ github.event.pull_request.number }}
-        repo: ${{ github.repository }}
-        base_ref: ${{ github.base_ref }}
-        github_token: ${{ secrets.GITHUB_TOKEN }}

.github/workflows/pr-validation.yml

@@ -0,0 +1,37 @@
+name: PR Validation
+
+on:
+  pull_request_target:
+    types: [opened, reopened, synchronize]
+
+permissions:
+  contents: read
+  pull-requests: write
+  issues: write
+jobs:
+  validate-pr:
+    runs-on: ubuntu-latest
+
+    steps:
+    # Step 1: Validate PR paths
+    - name: Validate PR Paths
+      uses: TiddlyWiki/cerebrus@v5
+      with:
+        pr_number: ${{ github.event.pull_request.number }}
+        repo: ${{ github.repository }}
+        base_ref: ${{ github.base_ref }}
+        github_token: ${{ secrets.GITHUB_TOKEN }}
+        mode: rules
+      continue-on-error: true
+    
+    # Step 2: Validate change notes
+    - name: Validate Change Notes
+      uses: TiddlyWiki/cerebrus@v5
+      with:
+        pr_number: ${{ github.event.pull_request.number }}
+        repo: ${{ github.repository }}
+        base_ref: ${{ github.base_ref }}
+        github_token: ${{ secrets.GITHUB_TOKEN }}
+        mode: changenotes
+      continue-on-error: false
+