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, 18 insertions, 0 deletions

diff --git a/core/ops_builtin.rs b/core/ops_builtin.rs
index 0c071a918..70f478acd 100644
--- a/core/ops_builtin.rs
+++ b/core/ops_builtin.rs
@@ -27,9 +27,12 @@ crate::extension!(
     op_wasm_streaming_feed,
     op_wasm_streaming_set_url,
     op_void_sync,
+    op_error_async,
+    op_error_async_deferred,
     op_void_async,
     op_void_async_deferred,
     op_add,
+    op_add_async,
     // TODO(@AaronO): track IO metrics for builtin streams
     op_read,
     op_read_all,
@@ -96,12 +99,27 @@ fn op_add(a: i32, b: i32) -> i32 {
   a + b
 }
 
+#[op]
+pub async fn op_add_async(a: i32, b: i32) -> i32 {
+  a + b
+}
+
 #[op(fast)]
 pub fn op_void_sync() {}
 
 #[op]
 pub async fn op_void_async() {}
 
+#[op]
+pub async fn op_error_async() -> Result<(), Error> {
+  Err(Error::msg("error"))
+}
+
+#[op(deferred)]
+pub async fn op_error_async_deferred() -> Result<(), Error> {
+  Err(Error::msg("error"))
+}
+
 #[op(deferred)]
 pub async fn op_void_async_deferred() {}