[core] Add ability for pet/player JA to target dead players

[WinterSolstice8]

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• I have read and understood the Contributing Guide and the Code of Conduct.
• I have tested my code and the things my code has changed since the last commit in the PR and will test after any later commits.

What does this pull request do?

This is plumbing for Cait Sith's raise 2 & Altana's Favor
Needed for #4625

Steps to test these changes

N/A, #4625 will use it.