Add straceable protocol operation binaries

Factor the benchmark scenarios into standalone example binaries that can be traced directly without cargo run, and simplify the hot call and hook lookup paths using the benchmark output as guidance.

examples/protocol_op_local_call_receive.rs

@@ -0,0 +1,8 @@
+#[path = "support/protocol_bench_common.rs"]
+mod common;
+
+fn main() {
+    let iterations = common::iterations_from_args(1_000);
+    common::run_local_call_receive(iterations);
+    println!("local_call_receive iterations={iterations}");
+}