Improve references search and quick info on properties with type errors within nullable contextual types (#61383)

src/services/services.ts

@@ -3575,6 +3575,7 @@ function getSymbolAtLocationForQuickInfo(node: Node, checker: TypeChecker): Symb
  * @internal
  */
 export function getPropertySymbolsFromContextualType(node: ObjectLiteralElementWithName, checker: TypeChecker, contextualType: Type, unionSymbolOk: boolean): readonly Symbol[] {
+    contextualType = contextualType.getNonNullableType();
     const name = getNameFromPropertyName(node.name);
     if (!name) return emptyArray;
     if (!contextualType.isUnion()) {