[2.0.6] What do we do with empty definitions?

Problem/Motivation

https://www.drupal.org/project/drupal_cms_olivero → has a few challenging quirks including empty component definitions:

# This component is used for search and is not intended to be used within
# Experience Builder, so no metadata is included.

https://git.drupalcode.org/project/drupal_cms_olivero/-/blob/1.2.x/compo...

# This component is used for search and is not intended to be used within
# Experience Builder, so no metadata is included.

libraryOverrides:
  dependencies:
    - core/drupal.autocomplete

https://git.drupalcode.org/project/drupal_cms_olivero/-/blob/1.2.x/compo...

Proposed resolution

What do we do with those? We ignore them in the ComponentSelector? Let's not ignore them at the ComponentPluginManager's discovery level, in order to not break projects using those components in Render API or Twig includes.