remove CKEditor 4 (contrib) and Convert Entity Media Embed

Now that we've switched to CK5 we can remove the contrib module for CK4. At this time, we should be safe to remove the Convert Entity Media Embed module as well.

added Module Updates label

assigned to @canini.16

added 20 commits

• b72aa634...63407e2a - 19 commits from branch main
• b69b018e - Merge branch 'main' into ckeditor4

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approved this merge request

merged

mentioned in commit fdcb6c7f