fix: cargo related fixes

Signed-off-by: Shriti Priya <shritip@ibm.com>

Author: monshri

crates/cpex-wasm-plugin/Cargo.toml

@@ -40,3 +40,6 @@ tokio = { version = "1", features = ["macros", "rt"] }
 
 [package.metadata.component]
 package = "cpex:plugin"
+
+[package.metadata.cargo-machete]
+ignored = ["wit-bindgen-rt"]