[Bug] Fixes Moveset Flyout not updating PP from Spite PP reduction

[schmidtc1]

Rebranch of #3132

What are the changes?

#2347
Fixes the visual bug with the Moveset Flyout not updating on Spite reductions.

Why am I doing these changes?

It is a visual bug.

What did change?

Removed the calculation done within the BattleFlyout class. Instead, I send the move's current pp value instead of the pp being used for that turn.
Dispatches a MoveUsedEvent in Spite with the newly reduced pp value.

Screenshots/Videos

Before

Before.flyout.fix.mp4

After

After.spite.flyout.fix.mp4

How to test the changes?

Give yourself Spite with src/overrides.ts, test against opponent's moves while checking the battle flyout using V button.

Checklist

• I'm using beta as my base branch
• 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 considered writing automated tests for the issue?
• 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?

[Snailman11]

Link to Discord's bug report (Bug with spite?)
https://discord.com/channels/1125469663833370665/1251572931964829709