[UI/UX] Change label for music settings

[DayKev]

What are the changes the user will see?

Music settings options changed from "Consistent/Mixed" to "Gen V + PMD/All Gens".

Why am I making these changes?

The existing labels don't tell the user what they do, leading to confusion.

What are the changes from a developer perspective?

New i18n keys created in settings.json: musicGenFive and musicAllGens.
Labels changed in settings.ts to use the new keys.

Screenshots/Videos

Checklist

• I'm using beta as my base branch
• There is no overlap with another PR?
• The PR is self-contained and cannot be split into smaller PRs?
• Have I provided a clear explanation of the changes?
• Have I tested the changes manually?
• Have I provided screenshots/videos of the changes (if applicable)?

Are there any localization additions or changes? If so:

• Has a locales PR been created on the locales repo?
  • If so, please leave a link to it here: Change music settings labels pokerogue-locales#90
• Has the translation team been contacted for proofreading/translation?

[Adri1]

As the related locale PR removes a key in the processes, the "Awaiting Locales" tag can't be applied here, so I remove it

[DayKev]

As the related locale PR removes a key in the processes, the "Awaiting Locales" tag can't be applied here, so I remove it

The locales PR needs to be merged first so I can update the submodule in this PR. This PR can't be merged before the locales PR.