fix: update type CSSModulesOptions interface

[psychobolt]

Description

This PR updates CSSModuleOptions to be in sync with the postcss modules documentation here: https://github.com/madyankin/postcss-modules

Additional context

---

What is the purpose of this pull request?

• Bug fix
• New Feature
• Documentation update
• Other

Before submitting the PR, please make sure you do the following

• Read the Contributing Guidelines, especially the Pull Request Guidelines.
• Check that there isn't already a PR that solves the problem the same way to avoid creating a duplicate.
• Provide a description in this PR that addresses what the PR is solving, or reference the issue that it solves (e.g. fixes #123).
• Update the corresponding documentation if needed.
• Ideally, include relevant tests that fail without this PR but pass with it.

[bluwy]

LGTM. Can you also update the types in the docs here?

vite/docs/config/shared-options.md

Lines 169 to 187 in c61c376

	```ts
	interface CSSModulesOptions {
	scopeBehaviour?: 'global' | 'local'
	globalModulePaths?: RegExp[]
	generateScopedName?:
	| string
	| ((name: string, filename: string, css: string) => string)
	hashPrefix?: string
	/**
	* default: null
	*/
	localsConvention?:
	| 'camelCase'
	| 'camelCaseOnly'
	| 'dashes'
	| 'dashesOnly'
	| null
	}
	```

Looks like some other fields are also outdated