test(integ-runner): sort mock calls in snapshot assets diff test

- Sort removeSyncMock.mock.calls before assertion to ensure consistent test results
- Reorder expected call array to match sorted output
- Prevents test flakiness caused by non-deterministic call ordering

Author: mrgrain

packages/@aws-cdk/integ-runner/test/runner/integ-test-runner.test.ts

@@ -576,13 +576,13 @@ describe('IntegTest runIntegTests', () => {
       testCaseName: 'xxxxx.test-with-snapshot-assets-diff',
     });
 
-    expect(removeSyncMock.mock.calls).toEqual([
+    expect(removeSyncMock.mock.calls.sort()).toEqual([
+      ['test/test-data/cdk-integ.out.xxxxx.test-with-snapshot-assets-diff.js.snapshot'],
       ['test/test-data/cdk-integ.out.xxxxx.test-with-snapshot-assets-diff.js.snapshot'],
       ['test/test-data/xxxxx.test-with-snapshot-assets-diff.js.snapshot'],
       [
         'test/test-data/xxxxx.test-with-snapshot-assets-diff.js.snapshot/asset.fec1c56a3f23d9d27f58815e0c34c810cc02f431ac63a078f9b5d2aa44cc3509',
       ],
-      ['test/test-data/cdk-integ.out.xxxxx.test-with-snapshot-assets-diff.js.snapshot'],
     ]);
   });