Convert many-inout test case to .wast (#1578)

* add many-inout .wast test

* remove old many-inout non-wast test

Author: Robbepop

crates/wasmi/src/engine/tests/many_inout.rs

@@ -1,5 +1,4 @@
 mod host_calls;
-mod many_inout;
 
 use super::{
     code_map::{CompiledFuncRef, EngineFunc},