feat(build): Re-enable indexer image build

Re-enables the indexer image in the build process by:
- Uncommenting its definition in the BASE_IMAGES list.
- Adding its dependency to the IMAGE_DEPENDENCIES hierarchy in the
  Google Cloud Build configuration.

Author: hunsche

infra/build/functions/base_images.py

@@ -65,7 +65,7 @@ def get_base_image_path(image_name):
     ImageConfig('base-clang-full',
                 path=get_base_image_path('base-clang'),
                 build_args=('FULL_LLVM_BUILD=1',)),
-    # ImageConfig('indexer', path=os.path.join('infra', 'indexer')),
+    ImageConfig('indexer', path=os.path.join('infra', 'indexer')),
     ImageConfig('base-builder'),
     ImageConfig('base-builder-go'),
     ImageConfig('base-builder-javascript'),

infra/build/functions/build_and_push_test_images.py

@@ -209,6 +209,7 @@ def gcb_build_and_push_images(test_image_tag: str, version_tag: str = None):
       'base-builder-rust': ['base-builder'],
       'base-builder-swift': ['base-builder'],
       'base-runner-debug': ['base-runner'],
+      'indexer': ['base-clang-full'],
   }
 
   steps = []