Not to try to reload a gun without default ammo type defined

[osuphobia]

Summary

Bugfixes "Not to try to reload a gun without default ammo type defined"

Purpose of change

When using guns that don't have default ammo type defined and must be used with an extra bore gunmod, don't try to reload one without a bore attached.
Close #71754

Describe the solution

Added item_location::can_reload_with to check if the gun has default ammo type defined.

Describe alternatives you've considered

Tried to modify item::can_reload_with, but looks like it's hard to get parent item without item_location known. find_parent didn't work.

Testing

Create a new world without this patch, spawn a desert eagle that has no bore by default, sees that you can reload it with an empty mag, and then reload the gun with .44 Magnum.
Save and quit, apply the batch and load the save, and now you can no longer reload the bald gun. Attach a .44 conversion kit to the gun, then you can reload it as normal.

Additional context

With this PR and #73043 merged, #71754 should be totally fixed.