Revert "Reapply "Use typed promises/resolvers for ReadableStream and related classes""

This reverts commit 39adf0544a3fbfcce710b0490d3825174c0c6e12.

Reason for revert: Crashes in the wild: crbug.com/332806529

Original change's description:
> Reapply "Use typed promises/resolvers for ReadableStream and related classes"
>
> This converts IDL-exposed promises in ReadableStream,
> ReadableStreamBYOBReader, ReadableStreamDefaultReader, and
> ReadableStreamGenericReader to use typed ScriptPromiseResolver
> instead of StreamPromiseResolver and to return typed
> ScriptPromises.
>
> Bug: 329702363
> Change-Id: I6dad0ce6902c2dd5411185800bdd5a6dd8585df8
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5410703
> Reviewed-by: Nidhi Jaju <[email protected]>
> Commit-Queue: Nate Chapin <[email protected]>
> Reviewed-by: Adam Rice <[email protected]>
> Cr-Commit-Position: refs/heads/main@{#1281906}

Bug: 329702363
Change-Id: I2a70811f87d844a1686fc082d67c8dbc473f91c2
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5427820
Commit-Queue: Nate Chapin <[email protected]>
Bot-Commit: Rubber Stamper <[email protected]>
Cr-Commit-Position: refs/heads/main@{#1283318}

Author: natechapin

long-animation-frame/tentative/loaf-stream-source-location.html

@@ -17,8 +17,7 @@ <h1>Long Animation Frame: source location extraction for streams</h1>
     const scriptElement = document.createElement("script");
     scriptElement.src = scriptLocation;
     document.body.appendChild(scriptElement);
-  }, script => {
-     return script.invoker === "Promise.resolve" }, t);
+  }, script => script.invoker === "StreamPromise.resolve.then", t);
 
   assert_true(script.sourceURL.includes("stream-promise-generates-loaf.js"));
 }, "Source location should be extracted for stream promises");

long-animation-frame/tentative/loaf-stream.html

@@ -34,6 +34,6 @@ <h1>Long Animation Frame: stream promise resolvers</h1>
     });
     response.body.pipeTo(writable);
     await readable.getReader().read();
-}, "resolve", "Promise.resolve");
+}, "resolve", "StreamPromise.resolve");
 </script>
 </body>