Async generator yield* skips custom Symbol.asyncIterator delegation in both engines #3616

A custom iterable with Symbol.asyncIterator can be consumed by for await, but SharpTS async generators fail to delegate to it with yield*. Run with --no-tsconfig --noLib and, for saved output, --compile --verify.

const iterable: any = {
    [Symbol.asyncIterator]() {
        return { next() { return Promise.resolve({ value: 1, done: false }); } };
    }
};
async function* inspect() {
    try {
        yield* iterable;
    } catch (error) {
        yield error.message;
    }
}
inspect().next().then(result => console.log(result.value, result.done));

• Node prints 1 false.
• The interpreter catches an error saying SharpTSObject is not iterable and prints that message followed by false.
• Saved compiled output passes IL verification and prints undefined true.

Changing the iterator step to Promise.resolve(1) should instead enter the catch with a TypeError. Node does so, but the SharpTS outputs are unchanged. This is the delegation path, found while testing the for-await case in #3607.