feat(ext/web): resourceForReadableStream (#20180)

Extracted from fast streams work.

This is a resource wrapper for `ReadableStream`, allowing us to treat
all `ReadableStream` instances as resources, and remove special paths in
both `fetch` and `serve`.

Performance with a ReadableStream response yields ~18% improvement:

```
  return new Response(new ReadableStream({
    start(controller) {
      controller.enqueue(new Uint8Array([104, 101, 108, 108, 111, 32, 119, 111, 114, 108, 100]));
      controller.close();
    }
  })
```

This patch:

```
12:36 $ third_party/prebuilt/mac/wrk http://localhost:8080
Running 10s test @ http://localhost:8080
  2 threads and 10 connections
  Thread Stats   Avg      Stdev     Max   +/- Stdev
    Latency    99.96us  100.03us   6.65ms   98.84%
    Req/Sec    47.73k     2.43k   51.02k    89.11%
  959308 requests in 10.10s, 117.10MB read
Requests/sec:  94978.71
Transfer/sec:     11.59MB
```

main:

```
Running 10s test @ http://localhost:8080
  2 threads and 10 connections
  Thread Stats   Avg      Stdev     Max   +/- Stdev
    Latency   163.03us  685.51us  19.73ms   99.27%
    Req/Sec    39.50k     3.98k   66.11k    95.52%
  789582 requests in 10.10s, 82.83MB read
Requests/sec:  78182.65
Transfer/sec:      8.20MB
```

0 files changed, 0 insertions, 0 deletions