fix: avatar cooldown reduction

[phacUFPE]

Description

This PR fixes the avatar cooldown reduction spells to be done in the source and remove from scripts, this is being done to work with #2602.

Behaviour

Actual

The avatar cooldown reduction is via script.

Expected

The avatar cooldown reduction is via source.

Type of change

• Bug fix (non-breaking change which fixes an issue)

How Has This Been Tested

Please describe the tests that you ran to verify your changes. Provide instructions so we can reproduce. Please also list any relevant details for your test configuration

• Cast Avatar spell of each vocation with stage 1 in wheel, the cooldown should be 120 minutes (two hours)
• Cast Avatar spell of each vocation with stage 2 in wheel, the cooldown should be 90 minutes (one and a half hour)
• Cast Avatar spell of each vocation with stage 3 in wheel, the cooldown should be 60 minutes (one hour)

Test Configuration:

• Server Version: Latest
• Client: 13.32
• Operating System: Windows 11

Checklist

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I checked the PR checks reports
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works