fix(port): allow blind throw while peeking upstairs/downstairs

[End3r991]

Purpose of change

Allow throw while peeking downstair/upstairs. Port of #49014 from DDA

Describe the solution

Remove look_around() handling in game::peek() when there is a z-lvl move, and let game::peek( const tripoint &p ) handle this.

Describe alternatives you've considered

Merging game::peek() and game::peek( const tripoint &p )

Testing

Additional context

Source PR: throw while peeking up/down stairs, by @Zeropol: CleverRaven/Cataclysm-DDA#49014

Checklist

[chaosvolt]

And amended the commit. It still shows as a separate thing but weh.

[chaosvolt]

1. Compiled and load-tested.
2. Tested peeking around corners both on surface level and below-ground, works normally as does throwing items around them.
3. Tested peeking and throwing up and down stairs, rock thrown where it's supposed to go.

Tested above both with and without 3D vision enabled.

Interesting bit of jank: it defaults to targetting things seen from your ORIGINAL position and not the position you're peeking into. I can't tab to this debug monster for example, but can throw if I manually select it. Happens both with and without 3D vision on:

Oddly, throwing up/down stairs works fine:

However, it still won't select NPCs correctly like this, only monsters. If I add a second debug monster I can tab between them but not the NPC.

I tested in build 2024-02-07 and the same-z-level weirdness is already present, with and without 3D vision on.