CA-422272: Validate pool ref in pool SSH helpers

[BengangY]

Pool.{enable,disable}_ssh and the shared timeout/auto-mode helpers ignored their pool ref, so an invalid handle disabled SSH pool-wide instead of raising HANDLE_INVALID. Validate self in Ssh.operate.

[psafont]

This seems strange, that handles aren't verified in another layer before this point

[BengangY]

This seems strange, that handles aren't verified in another layer before this point

Actually, there is function pool_uuid in message_forwarding.ml checking and printing pool ref/uuid, but it doesn't raise any exception for invalid pool ref.

[psafont]

This seems strange, that handles aren't verified in another layer before this point

Actually, there is function pool_uuid in message_forwarding.ml checking and printing pool ref/uuid, but it doesn't raise any exception for invalid pool ref.

It might be worth changing the code to raise it there, but it needs to be well-tested to see what calls are affected.

[BengangY]

This seems strange, that handles aren't verified in another layer before this point

Actually, there is function pool_uuid in message_forwarding.ml checking and printing pool ref/uuid, but it doesn't raise any exception for invalid pool ref.

It might be worth changing the code to raise it there, but it needs to be well-tested to see what calls are affected.

Yes, there are so many function using pool_uuid. So I need to check each function carefully.