chore: Allow 'DELETE' method for vfolder delete-from-trash API

[fregataa]

Currently only POST method is used for vfolder delete-from-trash API.
Let's allow DELETE method for easy usage.

Checklist: (if applicable)

• Milestone metadata specifying the target backport version

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📚 Documentation preview 📚: https://sorna--2082.org.readthedocs.build/en/2082/

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📚 Documentation preview 📚: https://sorna-ko--2082.org.readthedocs.build/ko/2082/

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[fregataa]

Close this PR because it will be confusing to add endpoint folders/_/delete-from-trash, which is different from folders/delete-from-trash.