add support for allow-cross-slot-keys for lua function

[3tieto]

Search before asking

• I had searched in the issues and found no similar issues.

Motivation

lua function can read/write cross slot keys

Solution

https://developer.redis.com/create/redis-functions/
like redis

Are you willing to submit a PR?

• I'm willing to submit a PR!

[PokIsemaine]

Hi @git-hulk @3tieto, I discovered this while creating a new #2414. I'd like to know the status of this issue, if it's still unresolved and no one is responsible, maybe I can give it a try.

[git-hulk]

@PokIsemaine Thanks for your interest and it's good to go ahead. But be careful that this flag only takes effect in cluster mode and script's generated keys, for the predeclared keys should also forbid crossing slots if my memory serves.