[Wrath Bracket] - VoA Warders should be introduce with the progression.

CC Issue: https://github.com/chromiecraft/chromiecraft/issues/9629

Currently there's no progression on each warden spawning, they just there.

Tempest Warder - https://wowgaming.altervista.org/aowow/?npc=34015 - Was introduced in 3.1 "Secrets of Ulduar"
https://wowpedia.fandom.com/wiki/Tempest_Warder

Flame Warder - https://wowgaming.altervista.org/aowow/?npc=35143 - Was introduced in 3.2 "Call of the Crusade"
https://wowpedia.fandom.com/wiki/Flame_Warder

Frost Warder - https://wowgaming.altervista.org/aowow/?npc=38482 - Was introduced in 3.3 "Fall of the Lich King"
https://wowpedia.fandom.com/wiki/Flame_Warder

Start with the linked ChromieCraft issue and the Tempest, Flame, and Frost Warder references to confirm the progression milestones. Locate the progression logic that controls VoA warder spawning; done means Tempest Warder appears in 3.1, Flame Warder in 3.2, and Frost Warder in 3.3 rather than all spawning immediately.

Written by the indexing model from the issue text.