ContentTypeLink definition should work correctly on Name without ID

[SubPointSupport]

ContentTypeLink definition should support defining only Name property without ID.

Name must be marked as a required prop.

Name is defined - the Name will be used for the lookup of the content type and adding it to the list.
Name and ID is defined - name will be used
Name is empty, ID is defined - there must be an exception.

Name is must have foe successful check if content type exists in the list.
Name should be used to lookup the content type at the site.
If ID is provided, that should be a fall-back to lookup the content type at site if it can't be find by name.

[SubPointSupport]

Both properties are required, won't be changed.