Add missing evolution entries

[FreakMediaLP]

Change description

Added missing evolution locations:

• "New Mauville" for "Magneton" and "Probopass" (available in ORAS)
• "Petalburg Woods" for "Leafeon" (available in ORAS)
• "Shoal Cave" for "Glaceon" (available in ORAS)

AI coding assistance disclosure

Used AI to get a better understanding of the pokemon_evolutions.csv and its connections with other .csv files.
All changes were made manually though.

Contributor check list

• I have written a description of the contribution and explained its motivation.
• I have written tests for my code changes (if applicable).
• I have read and understood the AI Assisted Contribution guidelines.
• I will own this change in production, and I am prepared to fix any bugs caused by my code change.