[Aghayenoor]

When esbuild lowers an async generator, each queued request waits for a promise reaction before resuming the generator. This can run the previous request’s .then() handler before the next part of the generator body, reversing the order seen with native async generators.

Keep an explicit FIFO queue and start the next request as soon as the current one settles. A synchronous throw rejects its request and advances the queue.

Fixes #4566.

go test ./... and node scripts/end-to-end-tests.js passed. The ordering regression fails before the fix and passes in both native and lowered execution afterward. The test also covers a queued throw() followed by next().