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, 6 insertions, 4 deletions

diff --git a/cli/tests/unit/metrics_test.ts b/cli/tests/unit/metrics_test.ts
index df2f1b2be..5fdfebc85 100644
--- a/cli/tests/unit/metrics_test.ts
+++ b/cli/tests/unit/metrics_test.ts
@@ -80,12 +80,14 @@ Deno.test(function metricsForOpCrates() {
 // Test that op_names == Objects.keys(Deno[Deno.internal].core.ops)
 // since building the per-op metrics depends on op_names being complete
 Deno.test(function opNamesMatch() {
+  // @ts-ignore: Deno[Deno.internal].core allowed
+  const ops = Object.keys(Deno[Deno.internal].core.ops);
+  // @ts-ignore: Deno[Deno.internal].core allowed
+  ops.concat(Object.keys(Deno[Deno.internal].core.asyncOps));
+
   assertEquals(
     // @ts-ignore: Deno[Deno.internal].core allowed
     Deno[Deno.internal].core.opNames().sort(),
-    // @ts-ignore: Deno[Deno.internal].core allowed
-    Object.keys(Deno[Deno.internal].core.ops).sort().filter((name) =>
-      name !== "asyncOpsInfo"
-    ),
+    ops.sort().filter((name) => name !== "asyncOpsInfo"),
   );
 });