Fix: experimentalDecorators renames class name in object literal key/member name positions

[Copilot]

With experimentalDecorators, the emitter incorrectly renamed identifiers matching the class name even in name positions (object literal keys, method shorthand names, field names) — which are not value references to the class and must not be substituted with the self-reference alias.

@dec
class SessionAuth {
  static requirement() {
    return { SessionAuth: [] }; // was wrongly emitted as { SessionAuth_1: [] }
  }
}

Root cause

visitIdentifier calls GetReferencedValueDeclaration, which falls through to ResolveName for declaration/key positions (the checker doesn't cache symbols there). This finds the class by textual name lookup, causing false substitutions. The prior fix (#3147) covered PropertyAccessExpression.name but missed other name positions.

Changes

• visitPropertyAssignment (new): Added to the visit switch. Skips the property key identifier for non-computed keys; visits only the initializer (and computed key expression when present).
• visitPropertyNameOfClassElement: Non-computed member names are now returned as-is without calling VisitNode, preventing visitIdentifier from substituting class member declaration names.
• hasInternalStaticReference: Added explicit switch cases for KindPropertyAssignment, KindPropertyDeclaration, KindMethodDeclaration, KindGetAccessor, KindSetAccessor that skip declaration name children and only recurse into expression/initializer/body subtrees. No .Parent access (forbidden by forbidparentaccess lint rule in transformers).

• Fixes experimentalDecorators: a class name used as an object literal key is renamed to the self-reference alias #4632