Add all git submodules to bootstrap.py. NFC (#23595)

This means that if any of these submodules are updated the bootstrap
script will run git submodule update. This is especially useful for
folks like me that have bootstrap run on checkout since it works when
bisecting across submodule updates.

Author: sbc100

bootstrap.py

@@ -26,9 +26,12 @@
      'tools/maint/run_python.bat',
      'tools/maint/run_python.sh',
      'tools/maint/run_python.ps1',
-   ],
-   [sys.executable, 'tools/maint/create_entry_points.py']),
-  ('git submodules', ['test/third_party/posixtestsuite/'], [shutil.which('git'), 'submodule', 'update', '--init']),
+   ], [sys.executable, 'tools/maint/create_entry_points.py']),
+  ('git submodules', [
+     'test/third_party/posixtestsuite/',
+     'test/third_party/googletest',
+     'test/third_party/wasi-test-suite',
+   ], [shutil.which('git'), 'submodule', 'update', '--init']),
 ]