Add new `XDELEX` commands to `commands.json`

[rueian]

We need to update commands.json and run go generate to update the command builder for the new XDELEX command.

XDELEX key [KEEPREF | DELREF | ACKED] IDS numids id [id ...]

See redis/redis#14130.

[mingdaoy]

I'd like to work on this. Thanks