Optional[customOptional[unknownIndicates that deletion-protected records should be also deleted
Attempt to delete a protected record without this flag set to true will cause a FAILED_PRECONDITION error
ID of the DNS record to delete
Optional: expected DNS record version (metadata.resource_version)
FAILED_PRECONDITION error is returned on version mismatch)0, the latest version will be deleted
Request to delete the DNS record by its ID