fix: Make CI Spawn method destroy the dummy item created after using it to spawn a pickup.

[Someone-193]

Description

Describe the changes
see title

What is the current behavior? (You can also link to an open issue here)
Currently whenever Spawn is called for a custom item, the item used to create the pickup is never destroyed

What is the new behavior? (if this is a feature change)
Now the item is destroyed (and it's done only in our version where we create the item as to not break others plugins)

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

Other information:

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