fix: firearms spawning with max ammo after being dropped

[Someone-193]

Description

Describe the changes
Fixes bug

What is the current behavior? (You can also link to an open issue here)
All dropped guns spawn with max ammo, regardless of how much they should have

What is the new behavior? (if this is a feature change)
Only newly spawned guns spawned directly from Pickup.Create get max ammo

Does this PR introduce a breaking change? (What changes might users need to make in their application due to this PR?)

Other information:
I have made a severe and continuous lapse in my judgement (I made PR that caused the bug)

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Documentations

Submission checklist

• I have checked the project can be compiled
• I have tested my changes and it worked as expected

Patches (if there are any changes related to Harmony patches)

• I have checked no IL patching errors in the console

Other

• Still requires more testing