[Wasm] Support coroutines

- Reuse JS IR Suspend function lowering
  - Fix types
  - Disable reinterpretCast-based optimization for inline
    classes
- Add basic support to Wasm stdlib
- Explicitly transform suspend functions into regular functions
  with continuations
- Clean suspend function handling from JS IR codegen

compiler/ir/serialization.js/src/org/jetbrains/kotlin/ir/backend/js/JsMapping.kt

@@ -36,6 +36,9 @@ class JsMapping(val state: JsMappingState) : DefaultMapping(state) {
     val enumEntryToCorrespondingField = state.newDeclarationToDeclarationMapping<IrEnumEntry, IrField>()
     val enumClassToInitEntryInstancesFun = state.newDeclarationToDeclarationMapping<IrClass, IrSimpleFunction>()
 
+    val suspendFunctionsToFunctionWithContinuations =
+        state.newDeclarationToDeclarationMapping<IrSimpleFunction, IrSimpleFunction>()
+
     val suspendArityStore = state.newDeclarationToDeclarationCollectionMapping<IrClass, Collection<IrSimpleFunction>>()
 }