Warning reported when using the latest version of the Components module

Problem/Motivation

We recently updated our Components module to the latest version and faced an issue with the GraphQL Twig module. In the Components module the way how you define the location of components has changed from the key component-libraries to the key components. The change was done in the following issue: https://www.drupal.org/project/components/issues/3091762

However GraphQL Twig module also looks for the key components from the active theme's info file, leading to a conflict. For example if you have defined custom namespaces for your components you would see the following warning as we are not providing a string/path to the check performed in GraphQL Twig.

Warning: is_dir() expects parameter 1 to be a valid path, array given in Drupal\graphql_twig\Template\Loader\Loader->findTemplate() (line 129 of modules/contrib/graphql_twig/src/Template/Loader/Loader.php).

Steps to reproduce

1. Update to/use the latest version of the Components module
2. Define component namespaces according to the new way in your theme's info file: https://www.drupal.org/project/components/issues/3091762
3. You will see the warning reported above when browsing the frontend

Proposed resolution

For now let's add a check for if we are actually including components with a hash in the component name (which you can do when using Fractal components) in the Drupal templates before scanning all the templates in the components folder. We can also add a check for if the parameter used in is_dir() is a string to avoid the parameter warning, but in reality if you are using Fractal components and the latest version of the Components module you will have issues anyway since the "components" definition is in conflict with each other.