fix: fixed npc health

[Bonjemus]

Description

Describe the changes
https://discord.com/channels/656673194693885975/1300857604620161064
NPC's health works correctly.
Custom role is removed even if it's the same roletype.

What is the current behavior? (You can also link to an open issue here)
NPC's health was always at 0, the custom health stat did nothing.
Custom role wasn't updated when a custom role A with a role was given to a player that already had custom role B with same role.

What is the new behavior? (if this is a feature change)

Does this PR introduce a breaking change? (What changes might users need to make in their application due to this PR?)
Yes.
HumeShieldStat is now obsolete.

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

[Bonjemus]

See : https://discord.com/channels/656673194693885975/1335260097974112266

[VALERA771]

I hope that nothing will be broken

[Bonjemus]

@Misfiy

[VALERA771]

I think some conditions in flashbang are wrong. Can you check if all good?