Only create ckeditor5 translation libraries for enabled languages

Problem/Motivation

Follow-up from #3516264: CKEditor 5 loads all plugin translations on AJAX operations.

ckeditor5_libraries_info_alter() creates translation libraries for every langcode that Drupal knows about, which is hundreds. We can limit it to only enabled libraries, would save some memory/cache storage with the library definitions.

This might require adding a languages cache tag or similar to the library definition cache.

Steps to reproduce

Proposed resolution

Remaining tasks

User interface changes

Introduced terminology

API changes

Data model changes

Release notes snippet