Feature: Cheat to fix station ratings at 100%

[2TallTyler]

Motivation / Problem

Station Ratings are generally considered to be a Bad Feature that prevent some gameplay styles, like running infrequent services with a low economy scale (#10606) to simulate a slower game, especially once we have configurable calendar speed.

Description

Upstream a JGRPP cheat to fix station ratings at 100%.

Limitations

• I considered the thorny issue of "Cheats are just another Settings menu", especially considering in Feature: Allow disabling local authority control of company actions #9833 we added the ability to disable local authorities using an existing Setting. However, that was an existing setting. I welcome discussion about where this should go. 😄

Checklist for review

Some things are not automated, and forgotten often. This list is a reminder for the reviewers.

• The bug fix is important enough to be backported? (label: 'backport requested')
• This PR touches english.txt or translations? Check the guidelines
• This PR affects the save game format? (label 'savegame upgrade')
• This PR affects the GS/AI API? (label 'needs review: Script API')
  • ai_changelog.hpp, game_changelog.hpp need updating.
  • The compatibility wrappers (compat_*.nut) need updating.
• This PR affects the NewGRF API? (label 'needs review: NewGRF')
  • newgrf_debug_data.h may need updating.
  • PR must be added to API tracker

[LordAro]

shipit, imo