lingotek_post_update_lingotek_metadata_dependencies() throws an error if you have orphaned config entities

I have a case where I have some lingotek_config_metadata entries for entities that no longer exist in my system. I am not completely sure of how this state came to be, but it is the case nonetheless. This results in the following error whenever I try to run updb:

Fatal error: Call to a member function getConfigDependencyName() on null in [...]/modules/contrib/lingotek/src/Entity/LingotekConfigMetadata.php on line 170

Lingotek needs to fail more gracefully if these entities no longer exist. This is similar to: #2783557: Disassociating all translations throws an error if you have "orphaned" records