Fix difficulty scaling to Mannequin damage

[vilikili]

Currently the mannequin takes damage as if the difficulty was set to normal.

This PR fixes that by checking the level difficulty & applying the correct amount of damage.

[Owen1212055]

Is there an mc bug report for this? I'm not sure about deviating from vanilla here and this doesn't quite make sense.

[CJendantix]

Is there an mc bug report for this? I'm not sure about deviating from vanilla here and this doesn't quite make sense.

https://report.bugs.mojang.com/servicedesk/customer/portal/2/MC-305338

[mbax]

Usable link: https://bugs.mojang.com/browse/MC/issues/MC-305338

[Owen1212055]

Thank you for the PR!

However, I will be closing this PR as invalid.

In general, this damage scaling seems to only be applicable to Player entities and not mannequins. It doesn't really make sense for damage scaling to be applied to these entity types, as additionally these checks also in some cases check for Players (WHEN_CAUSED_BY_LIVING_NON_PLAYER) which doesnt really make sense now anymore.

If the bug report is accepted, this decision could be revisited.