Attempt to re-enable integration_tests-macos (#36123)

.cirrus.yml

@@ -498,7 +498,7 @@ task:
         - dart --enable-asserts dev/bots/test.dart
     - name: build_tests-macos
       env:
-        SHARD: build_tests # we should also enable integration_tests at some point, but it's too flaky right now
+        SHARD: build_tests
         COCOAPODS_DISABLE_STATS: true
         FLUTTER_FRAMEWORK_DIR: "/tmp/flutter sdk/bin/cache/artifacts/engine/ios/"
       osx_instance:
@@ -507,6 +507,12 @@ task:
       test_all_script:
         - ulimit -S -n 2048 # https://github.com/flutter/flutter/issues/2976
         - dart --enable-asserts dev/bots/test.dart
+    - name: integration_tests-macos
+      env:
+        SHARD: integration_tests
+      test_all_script:
+        - ulimit -S -n 2048 # https://github.com/flutter/flutter/issues/2976
+        - dart --enable-asserts dev/bots/test.dart
     - name: add2app-macos
       env:
         SHARD: add2app_test