Fix workflow merging issue for performance tests

.github/workflows/reassurePerformanceTests.yml

@@ -13,6 +13,8 @@ jobs:
     steps:
       - name: Checkout
         uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
 
       - name: Setup NodeJS
         uses: ./.github/actions/composite/setupNode
@@ -22,6 +24,22 @@ jobs:
             git config --global user.email "test@test.com"
             git config --global user.name "Test"
 
+      - name: Get common ancestor commit
+        run: |
+            git fetch origin main
+            common_ancestor=$(git merge-base "${{ github.sha }}" origin/main)
+            echo "COMMIT_HASH=$common_ancestor" >> "$GITHUB_ENV"
+
+      - name: Clean up deleted files
+        run: |
+            DELETED_FILES=$(git diff --name-only --diff-filter=D "$COMMIT_HASH" "${{ github.sha }}")
+            for file in $DELETED_FILES; do
+              if [ -n "$file" ]; then
+                rm -f "$file"
+                echo "Deleted file: $file"
+              fi
+            done
+
       - name: Run performance testing script
         shell: bash
         run: |