fix(Core/Scripts) Fixes the misuse of the "Acidic Wound" skill in Phase 2

[EricksOliveira]

Added conditional check in JustEngagedWith to prevent Acidic Wound from being cast during Phase 2.

Changes Proposed:

This PR proposes changes to:

• [x ] Core (units, players, creatures, game systems).
• Scripts (bosses, spell scripts, creature scripts).
• Database (SAI, creatures, etc).

Issues Addressed:

• Closes [Black Temple] Boss: Gurtogg Bloodboil shouldn't apply Acidic Wound in Phase 2 #21204
• Closes [Black Temple] Gurtogg Bloodboil applies Acidic Wound in P2 chromiecraft/chromiecraft#7674

SOURCE:

The changes have been validated through:

• [x ] Live research (checked on live servers, e.g Classic WotLK, Retail, etc.)
• Sniffs (remember to share them with the open source community!)
• [x ] Video evidence, knowledge databases or other public sources (e.g forums, Wowhead, etc.)
• The changes promoted by this pull request come partially or entirely from another project (cherry-pick). Cherry-picks must be committed using the proper --author tag in order to be accepted, thus crediting the original authors, unless otherwise unable to be found

Tests Performed:

This PR has been:

• [x ] Tested in-game by the author.
• Tested in-game by other community members/someone else other than the author/has been live on production servers.
• This pull request requires further testing and may have edge cases to be tested.

How to Test the Changes:

• [x ] This pull request can be tested by following the reproduction steps provided in the linked issue
• This pull request requires further testing. Provide steps to test your changes. If it requires any specific setup e.g multiple players please specify it as well.

1. Be the target on Gurtogg's Fel Rage

Known Issues and TODO List:

• [ ]
• [ ]

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[Nyeriah]

Were the changes on this PR tested?

[Nyeriah]

JustEngagedWith() is only called once, when the creature first enters combat. Gurtogg casts the aura (SPELL_ACIDIC_WOUND) on himself on pull, the aura then triggers the application as long as he has the aura. So this PR as it is, cannot address this issue

[EricksOliveira]

Were the changes on this PR tested?

I apologize. I made a quick update without testing. But I'm working on it. I'll be sending an update today to resolve the issue.