WASM: Stupidify unit handling

Now every IR instruction returns an actual Unit instance.
All Unit's are actual objects passed around except for function boundaries.

js/js.tests/tests-gen/org/jetbrains/kotlin/js/test/es6/semantics/IrJsCodegenBoxES6TestGenerated.java

@@ -28667,6 +28667,11 @@ public class IrJsCodegenBoxES6TestGenerated extends AbstractIrJsCodegenBoxES6Tes
             runTest("compiler/testData/codegen/box/unit/nullableUnitInWhen3.kt");
         }
 
+        @TestMetadata("sillyThings.kt")
+        public void testSillyThings() throws Exception {
+            runTest("compiler/testData/codegen/box/unit/sillyThings.kt");
+        }
+
         @TestMetadata("unitClassObject.kt")
         public void testUnitClassObject() throws Exception {
             runTest("compiler/testData/codegen/box/unit/unitClassObject.kt");

js/js.tests/tests-gen/org/jetbrains/kotlin/js/test/ir/semantics/IrJsCodegenBoxTestGenerated.java

@@ -28073,6 +28073,11 @@ public class IrJsCodegenBoxTestGenerated extends AbstractIrJsCodegenBoxTest {
             runTest("compiler/testData/codegen/box/unit/nullableUnitInWhen3.kt");
         }
 
+        @TestMetadata("sillyThings.kt")
+        public void testSillyThings() throws Exception {
+            runTest("compiler/testData/codegen/box/unit/sillyThings.kt");
+        }
+
         @TestMetadata("unitClassObject.kt")
         public void testUnitClassObject() throws Exception {
             runTest("compiler/testData/codegen/box/unit/unitClassObject.kt");

js/js.tests/tests-gen/org/jetbrains/kotlin/js/test/semantics/JsCodegenBoxTestGenerated.java

@@ -28013,6 +28013,11 @@ public class JsCodegenBoxTestGenerated extends AbstractJsCodegenBoxTest {
             runTest("compiler/testData/codegen/box/unit/nullableUnitInWhen3.kt");
         }
 
+        @TestMetadata("sillyThings.kt")
+        public void testSillyThings() throws Exception {
+            runTest("compiler/testData/codegen/box/unit/sillyThings.kt");
+        }
+
         @TestMetadata("unitClassObject.kt")
         public void testUnitClassObject() throws Exception {
             runTest("compiler/testData/codegen/box/unit/unitClassObject.kt");

js/js.tests/tests-gen/org/jetbrains/kotlin/js/test/wasm/semantics/IrCodegenBoxWasmTestGenerated.java

@@ -16095,6 +16095,11 @@ public class IrCodegenBoxWasmTestGenerated extends AbstractIrCodegenBoxWasmTest
             runTest("compiler/testData/codegen/box/unit/nullableUnitInWhen3.kt");
         }
 
+        @TestMetadata("sillyThings.kt")
+        public void testSillyThings() throws Exception {
+            runTest("compiler/testData/codegen/box/unit/sillyThings.kt");
+        }
+
         @TestMetadata("unitClassObject.kt")
         public void testUnitClassObject() throws Exception {
             runTest("compiler/testData/codegen/box/unit/unitClassObject.kt");