JVM_IR: fix Result types in continuations & remove more codegen hacks

#KT-47129 Fixed

compiler/fir/fir2ir/tests-gen/org/jetbrains/kotlin/test/runners/codegen/FirBlackBoxCodegenTestGenerated.java

@@ -10259,6 +10259,12 @@ public class FirBlackBoxCodegenTestGenerated extends AbstractFirBlackBoxCodegenT
                 runTest("compiler/testData/codegen/box/coroutines/inlineClasses/genericParameterResult.kt");
             }
 
+            @Test
+            @TestMetadata("kt47129.kt")
+            public void testKt47129() throws Exception {
+                runTest("compiler/testData/codegen/box/coroutines/inlineClasses/kt47129.kt");
+            }
+
             @Test
             @TestMetadata("nonLocalReturn.kt")
             public void testNonLocalReturn() throws Exception {