fix(Scripts/Gundrak): Eck the Ferocious wrong enrage timing

[blinkysc]

[!] Please Read! This PR comes from AI with MCP

Changes Proposed:

This PR proposes changes to:

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

Changes:

• Change berserk timer from random 60-90s to exactly 90s
• Add "grows increasingly crazed" emote at 76-78s before berserk (using BroadcastTextId 30727)
• Remove incorrect 21% health berserk trigger (EVENT_ECK_HEALTH)

Issues Addressed:

• Closes [Gundrak] Eck wrong enrage #23084

SOURCE:

The changes have been validated through:

• Live research (checked on live servers, e.g Classic WotLK, Retail, etc.)
• Sniffs (remember to share them with the open source community!)
• 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

Video evidence from the issue:

• Wotlk Classic Heroic - Multiple attempts showing 90s enrage timing
• Wotlk Classic Heroic+ - Shows emote at ~78s and enrage at 90s
• Wotlk Classic Heroic+ - Shows emote at ~76s
• Wotlk Classic Heroic+ - Shows emote at ~77s

Tests Performed:

This PR has been:

• 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:

• 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. .tele Gundrak
2. Set instance to Heroic mode
3. .go c id 29305 (go to Moorabi)
4. Kill Moorabi to spawn Eck
5. .reload creature_text
6. Engage Eck and verify:
   • At 76-78 seconds: Raid boss emote "Eck the Ferocious grows increasingly crazed!" appears
   • At exactly 90 seconds: Berserk triggers
   • Below 21% health: Should NOT trigger early berserk (old bugged behavior removed)

Known Issues and TODO List:

• None

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