refactor(rome_js_analyze): improve useEnumInitializers

[Conaclos]

Summary

The rule now reports all uninitialized members of an enum in a single diagnostic.
This reduces the noise produced by the rule.
This also simplifies the implementation of the quick-fix.

Moreover, ambient enum declarations are now ignored.
This avoids reporting ambient enum declarations in TypeScript declaration files.

declare enum Weather {
  Rainy,
  Sunny,
}

Test Plan

New tests included.

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