Detect direct Locale#t calls based on type information

[filipsobol]

🚀 Summary

Detect direct Locale#t calls (such as editor.locale.t(), editor.t(), locale.t(), and this.t()) during translation validation and synchronization based on type information.

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📌 Related issues

• Closes Update translations validation to work based on type information ckeditor5#19267.

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💡 Additional information

I ran translations:validate and translations:synchronize in both repositories, and it worked correctly.

The old mechanism still works for JS-only files. However, TS sources will now be based on more accurate type information.

[cursor]

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[pomek]

Confirm manually please, if this solution does not re-introduce this problem – https://github.com/ckeditor/ckeditor5-internal/issues/3115.

[filipsobol]

Confirm manually please, if this solution does not re-introduce this problem – ckeditor/ckeditor5-internal#3115.

As mentioned in the original comment, I already ran translations:validate and translations:synchronize and didn't find any regressions.

I checked this case again, and it's still covered. I added regression tests, just so we don't reintroduce this in the future.