Add test for run

Exercising the `Err(())` return type

Author: saulecabrera

tests/rust/wasm32-wasip3/src/bin/run-with-err.json

@@ -0,0 +1,11 @@
+{
+  "operations": [
+    {
+      "type": "run"
+    },
+    {
+      "type": "wait",
+      "exit_code": 1
+    }
+  ]
+}

tests/rust/wasm32-wasip3/src/bin/run-with-err.rs

@@ -0,0 +1,14 @@
+use test_wasm32_wasip3::cli::{export, exports::wasi::cli::run::Guest};
+
+struct Component;
+export!(Component);
+
+impl Guest for Component {
+    async fn run() -> Result<(), ()> {
+        Err(())
+    }
+}
+
+fn main() {
+    unreachable!()
+}