Fix Bayonets (remove reach atk. mode flag, and other stuff too)

[tenmillimaster]

Summary

None

Purpose of change

Makeshift bayonet still gave a reach attack. Also I thought about it some more and figure underbarrel was the right home for it afterall, not bayonet lug, as we'd want this to be installed on pretty much everything.
The mode_modifier entry in bayonets added an unnecessary REACH_ATTACK flag in reachless bayonets.
Also I missed adding the enfield bayonet to all the underbarrel slot conflicting items .

Describe the solution

Adds Enfield Bayonet as a conflict on appropriate gunmods.
Removes vestigial reach attack flag.
Removes reach attack range from makeshift bayonet.
Flips makeshift bayonet back to underbarrel slot.

Describe alternatives you've considered

None

Testing

Loaded game. Made sure bayonets were still adding additional damage and beat up the poor debug monster a bit.

Additional context

None.