Reject FORMAT ENCODE options in WITH options

[xxchan]

e.g.,

CREATE SINK ...
WITH (
    ...
    timestamptz.handling.mode='utc_without_suffix'
) FORMAT UPSERT ENCODE JSON;

This will succeed, but utc_without_suffix doesn't work.
The correct version is

CREATE SINK ...
WITH (
    ...
) FORMAT UPSERT ENCODE JSON (
	timestamptz.handling.mode='utc_without_suffix'
);

We should reject the wrong version, instead of accepting it silently.

[xxchan]

I think after #13762, the frontend's behavior changed, but

• we didn't reject it in frontend
• doc might also need to highlight the difference