Support for multi-value wasm (#399)

* deps: bump wasmparser to 0.39.2

This has a bug fix for multi-value Wasm validation that is required for getting
the spec tests passing.

https://github.com/yurydelendik/wasmparser.rs/pull/135

* Update cranelift to 0.46.1 to get multi-value Wasm support

The `cranelift_wasm` APIs had to change a little bit to maintain state necessary
when translating multi-value Wasm blocks. The `translate_module` function now
returns a `ModuleTranslationState` that is borrowed during each function's
translation.

* Enable multi-value proposal's spec tests

This enables all the Wasm multi-value proposal's spec tests other than the ones
that rely on functions having more return values than registers available on the
target. That is not supported by cranelift yet.

* wasmtime-interface-types: always use multi-value Wasm

And remove the return pointer hacks that work around the lack of multi-value.

src/bin/wasm2obj.rs

@@ -238,7 +238,13 @@ fn handle_module(
     // Decide how to compile.
     let strategy = pick_compilation_strategy(cranelift, lightbeam);
 
-    let (module, lazy_function_body_inputs, lazy_data_initializers, target_config) = {
+    let (
+        module,
+        module_translation,
+        lazy_function_body_inputs,
+        lazy_data_initializers,
+        target_config,
+    ) = {
         let environ = ModuleEnvironment::new(isa.frontend_config(), tunables);
 
         let translation = environ
@@ -247,6 +253,7 @@ fn handle_module(
 
         (
             translation.module,
+            translation.module_translation.unwrap(),
             translation.function_body_inputs,
             translation.data_initializers,
             translation.target_config,
@@ -259,6 +266,7 @@ fn handle_module(
             CompilationStrategy::Auto | CompilationStrategy::Cranelift => {
                 Cranelift::compile_module(
                     &module,
+                    &module_translation,
                     lazy_function_body_inputs,
                     &*isa,
                     generate_debug_info,
@@ -268,6 +276,7 @@ fn handle_module(
             #[cfg(feature = "lightbeam")]
             CompilationStrategy::Lightbeam => Lightbeam::compile_module(
                 &module,
+                &module_translation,
                 lazy_function_body_inputs,
                 &*isa,
                 generate_debug_info,