[Bug] Fix multi-hit early stopping on spread moves

[innerthunder]

What are the changes?

This fixes a bug where a spread move (e.g. Earthquake) from a source holding Multi-Lens only strikes each target once if one of those targets is protected or has an ability that nullifies damage.

Why am I doing these changes?

This bug was reported in the Discord. You can see Discharge incorrectly stopping in the video below

Screen_Recording_20240627_104035_Chrome.mp4

The user also provided beautiful artwork of the move's current behavior:

What did change?

Pokemon.stopMultiHit() now has an optional target parameter. If target is specified, the target is removed from the targets list in MoveEffectPhase for future strikes of the move.

Screenshots/Videos

The video below shows Earthquake hitting the opponents multiple times despite the user's ally using Protect in the same turn.

PokeRogue.-.Google.Chrome.2024-06-26.20-42-24.mp4

How to test the changes?

To test via overrides.ts:

• Force double battles.
• Give player pokemon a spread move (e.g. Moves.EARTHQUAKE) and Moves.PROTECT)
• Add `{name: "MULTI_LENS"} to the starting held item override array
• In battle, make the Pokemon with Multi-Lens use the spread move, and have the other Pokemon use Protect. The spread move should hit the enemies twice and hit into your ally's Protect once.

Checklist

• There is no overlap with another PR?
• The PR is self-contained and cannot be split into smaller PRs?
• Have I provided a clear explanation of the changes?
• Have I tested the changes (manually)?
  • Are all unit tests still passing? (npm run test)
• Are the changes visual?
  • Have I provided screenshots/videos of the changes?