[js-api-parser] missing `...` before rest parameters

This diff shows up for core-tracing: https://spa.apiview.dev/review/79958d8ffa7f4c02b959bac810b3bd0f?activeApiRevisionId=41acf8f422d84929b3777d7e9501e0b5&diffApiRevisionId=b4266cc578174b9981f813e86cd51f54&diffStyle=full

Looks a regression from previous version. Here's the source code

```ts
withContext<
CallbackArgs extends unknown[],
Callback extends (...args: CallbackArgs) => ReturnType,
>(
context: TracingContext,
callback: Callback,
...callbackArgs: CallbackArgs
): ReturnType;

```