test: search cctest files

To prevent a new cctest missing from the `node.gyp`, search cctest
files with tool `search_files.py` at configure time.

node.gyp

@@ -402,26 +402,8 @@
     ],
     'node_cctest_sources': [
       'src/node_snapshot_stub.cc',
-      'test/cctest/node_test_fixture.cc',
-      'test/cctest/node_test_fixture.h',
-      'test/cctest/test_aliased_buffer.cc',
-      'test/cctest/test_base64.cc',
-      'test/cctest/test_base_object_ptr.cc',
-      'test/cctest/test_cppgc.cc',
-      'test/cctest/test_node_postmortem_metadata.cc',
-      'test/cctest/test_node_task_runner.cc',
-      'test/cctest/test_environment.cc',
-      'test/cctest/test_linked_binding.cc',
-      'test/cctest/test_node_api.cc',
-      'test/cctest/test_path.cc',
-      'test/cctest/test_per_process.cc',
-      'test/cctest/test_platform.cc',
-      'test/cctest/test_report.cc',
-      'test/cctest/test_json_utils.cc',
-      'test/cctest/test_sockaddr.cc',
-      'test/cctest/test_traced_value.cc',
-      'test/cctest/test_util.cc',
-      'test/cctest/test_dataqueue.cc',
+      '<!@(<(python) tools/search_files.py . test/cctest cc)',
+      '<!@(<(python) tools/search_files.py . test/cctest h)',
     ],
     'node_cctest_openssl_sources': [
       'test/cctest/test_crypto_clienthello.cc',