Optim: Reduce allocations when running reloading logic on the server
- Added non-allocating singular IAmmoContainer.FindX methods
We've got a bunch of places where we are only interested in result but try to gather all.
Tests: Built all modes in editor. In local session, shot a couple mags with different ammo types. Explicitly switched ammo type via radial menu, and implicitly via reload-on-empty.