Fix AI unalives self with Shanid (#9123)

[CTimmerman]

Fixes #9123 by checking for Shanid, Sleepers' Scourge's life loss and card draw before playing legendary lands or casting legendary spells.

[tool4ever]

you're pretty close to the right util methods already:

forge/forge-ai/src/main/java/forge/ai/AiController.java

Lines 1003 to 1010 in a3b6b15

	damage = ComputerUtil.getDamageForPlaying(player, sa);
	if (damage >= player.getLife()) {
	// TODO even if it doesn't kill AI lower the score
	return AiPlayDecision.CurseEffects;
	}
	}
	if (card.isPermanent() && !sa.isMutate()) {
	damage += ComputerUtil.getDamageFromETB(player, card);

please modify those instead:
that way you should also be able to leverage findSubAbilityByType and avoid ugly hardcoded logic

[CTimmerman]

So add lifeloss to getDamageForPlaying or make a new similar function and also for drawing? getLossForDrawing?

[tool4ever]

check both methods, you'll see lifeloss is already handled there

and there is no loss for drawing here, better not mix up too much or you risk making things hard to merge again

[CTimmerman]

You told me not to rebase, and I've only added one commit to an existing MR of mine. Keep your vagueness and DIY. It works for me now and my branch works for my decks. I'm tired of waiting for even approved MRs.