HealingSystem: Check bleeding or restoring blood in HasDamage.

[whatston3]

About the PR

Allows healing items to repeatedly heal if they staunch bleeding or restore blood on a target that isn't damaged in a relevant way (e.g. using gauze or a blood pack on a bleeding body with 50% blood volume, but only radiation damage)

Why / Balance

https://discord.com/channels/1123826877245694004/1307968742340427828

Checks were inconsistent - one of two existing ones looked at restoring blood, neither looked at staunching blood. With different maxBleedAmounts, this becomes much more relevant.

How to test

1. Spawn Urist.
2. Spawn bang stick, 200 dmg
3. Bonk Urist.
4. Check damage.
5. Apply Gauze.
6. Bleeding should stop, blunt damage should be untouched.
7. Apply blood pack.
8. Blood should be restored, you should be able to apply a blood pack multiple times until all blood is restored.

Media

Requirements

• I have read and am following the Pull Request and Changelog Guidelines.
• I have added media to this PR or it does not require an ingame showcase.

Breaking changes

Changelog

🆑

• add: Blood restoring/hemostatic items can be used even if the user isn't damaged.

[dvir001]

This should probably be a PR on wizden.

[whatston3]

This should probably be a PR on wizden.

space-wizards/space-station-14#33526

Did it.