fix: use hook filters in optimize-locales-plugin

[wojtekmaj]

Closes #10301

✅ Pull Request Checklist:

• Included link to corresponding React Spectrum GitHub Issue.
• Added/updated unit tests and storybook for this change (for new code or code which already has tests).
• Filled out test instructions.
• Updated documentation (if it already exists for this component).
• Looked at the Accessibility Practices for this feature - Aria Practices

📝 Test Instructions:

Monkey patch any project using optimize-locales-plugin with the same patch. Observe:

Before:

Benchmark 1: yarn build
  Time (mean ± σ):      2.251 s ±  0.041 s    [User: 3.505 s, System: 0.859 s]
  Range (min … max):    2.201 s …  2.315 s    5 runs

After:

Benchmark 1: yarn build
  Time (mean ± σ):      2.198 s ±  0.041 s    [User: 3.328 s, System: 0.819 s]
  Range (min … max):    2.160 s …  2.267 s    5 runs

This was originally spotted thanks to Rolldown perfshaming us:

[PLUGIN_TIMINGS] Your build spent significant time in plugins. Here is a breakdown:
  - locales-plugin (76%)
  - vite:handlebars (12%)
  - sentry-vite-plugin (6%)
See https://rolldown.rs/reference/InputOptions.checks#plugintimings for more details.

Also ran locally:

yarn format packages/dev/optimize-locales-plugin/LocalesPlugin.js
node -e "require('./packages/dev/optimize-locales-plugin/LocalesPlugin.js')"

Not exactly earth-shattering, but hey, less perfshaming.

🧢 Your Project:

[snowystinger]

Thanks, looks like some tests need updates though