[GHA] Add API breaking check

# Motivation

The next GH action pipeline that we need is to add our API breaking change checker.

# Modification

This PR adds an API breaking change job to our pull request workflow.

.github/workflows/pull_requests.yml

@@ -6,7 +6,7 @@ on:
 
 ## We are cancelling previously triggered workflow runs
 concurrency:
-  group: ${{ github.workflow }}-${{ github.event.ref }}
+  group: ${{ github.workflow }}-${{ github.ref }}
   cancel-in-progress: true
 
 jobs:
@@ -28,4 +28,14 @@ jobs:
       uses: actions/checkout@v4
     - name: Run tests
       run: swift test
-      timeout-minutes: 20
+      timeout-minutes: 20
+
+  api-breakage:
+    runs-on: ubuntu-latest
+    container: swift:5.10-noble
+    timeout-minutes: 20
+    steps:
+    - name: Checkout repository
+      uses: actions/checkout@v4
+      - name: Run API breakage check
+        run: swift package diagnose-api-breaking-changes origin/main