Added C++/Lua hooks for AActor::Endplay

[UE4SS]

Description

This PR adds hooks accessible via both Lua and C++ for AActor::EndPlay, in the same way that we have AActor::BeginPlay.

Type of change

• New feature (non-breaking change which adds functionality)

How Has This Been Tested?

Make a Lua mod, register an EndPlay hook that prints the object name.
Start a game, load some save files, and quit.
Open UE4SS.log and make sure the output is correct.

Checklist

• I have added the necessary description of this PR to the changelog, and I have followed the same format as other entries.
• Any dependent changes have been merged and published in downstream modules.

Additional context

This may not be merged until #768 is merged.
If #768 doesn't get merged, this PR must be rebased onto main.

[UE4SS]

Note that CI fails only because the branch is based on a commit that doesn't have the latest Unreal module commit.
It will pass when #768 is merged, and/or this branch is rebased onto main.

[github-actions]

No description provided.

[CookiePLMonster]

Confirmed working: