perf(core): async op pseudo-codegen and performance work (#18887)

Performance:

```
async_ops.js: 760k -> 1030k (!)
async_ops_deferred.js: 730k -> 770k
Deno.serve bench: 118k -> 124k
WS test w/ third_party/prebuilt/mac/load_test 100 localhost 8000 0 0: unchanged

Startup time: approx 0.5ms slower (13.7 -> 14.2ms)
```

1 files changed, 28 insertions, 5 deletions

diff --git a/cli/tests/unit/opcall_test.ts b/cli/tests/unit/opcall_test.ts
index 8985c9780..3b37f8c09 100644
--- a/cli/tests/unit/opcall_test.ts
+++ b/cli/tests/unit/opcall_test.ts
@@ -1,20 +1,18 @@
 // Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
 
+import { assertEquals } from "https://deno.land/std@v0.42.0/testing/asserts.ts";
 import { assert, assertStringIncludes, unreachable } from "./test_util.ts";
 
 Deno.test(async function sendAsyncStackTrace() {
-  const buf = new Uint8Array(10);
-  const rid = 10;
   try {
-    await Deno.read(rid, buf);
+    await core.ops.op_error_async();
     unreachable();
   } catch (error) {
     assert(error instanceof Error);
     const s = error.stack?.toString();
     assert(s);
-    console.log(s);
     assertStringIncludes(s, "opcall_test.ts");
-    assertStringIncludes(s, "read");
+    assertStringIncludes(s, "sendAsyncStackTrace");
     assert(
       !s.includes("ext:core"),
       "opcall stack traces should NOT include ext:core internals such as unwrapOpResult",
@@ -22,6 +20,31 @@ Deno.test(async function sendAsyncStackTrace() {
   }
 });
 
+Deno.test(async function sendAsyncStackTraceDeferred() {
+  try {
+    await core.ops.op_error_async_deferred();
+    unreachable();
+  } catch (error) {
+    assert(error instanceof Error);
+    const s = error.stack?.toString();
+    assert(s);
+    assertStringIncludes(s, "opcall_test.ts");
+    assertStringIncludes(s, "sendAsyncStackTraceDeferred");
+    assert(
+      !s.includes("ext:core"),
+      "opcall stack traces should NOT include ext:core internals such as unwrapOpResult",
+    );
+  }
+});
+
+Deno.test(function syncAdd() {
+  assertEquals(30, core.ops.op_add(10, 20));
+});
+
+Deno.test(async function asyncAdd() {
+  assertEquals(30, await core.ops.op_add_async(10, 20));
+});
+
 // @ts-ignore This is not publicly typed namespace, but it's there for sure.
 const core = Deno[Deno.internal].core;