[Wasm] Port JS interop type checker to K2 (KT-56849)

wasm/wasm.frontend/src/org/jetbrains/kotlin/wasm/resolve/diagnostics/WasmJsInteropTypesChecker.kt

@@ -23,7 +23,6 @@ import org.jetbrains.kotlin.types.typeUtil.isUnit
 import org.jetbrains.kotlin.types.typeUtil.makeNotNullable
 import org.jetbrains.kotlin.wasm.util.hasValidJsCodeBody
 
-// TODO: Implement in K2: KT-56849
 object WasmJsInteropTypesChecker : DeclarationChecker {
     override fun check(declaration: KtDeclaration, descriptor: DeclarationDescriptor, context: DeclarationCheckerContext) {
         if (descriptor !is MemberDescriptor)
@@ -119,7 +118,7 @@ private fun isTypeSupportedInJsInterop(
         return true
     }
 
-    // Interop type parameters upper bounds should are checked
+    // Interop type parameters upper bounds should be checked
     // on declaration site separately
     if (nonNullable.isTypeParameter()) {
         return true