JVM_IR: unwrap suspend views when generating SAM wrappers

If the super class is in a file that has already been lowered, the base
method has an extra continuation parameter which breaks things.

Also, SAM wrappers around functional objects are tail-call and do not
need continuations ever, so don't even try.

^KT-50950 Fixed

native/native.tests/tests-gen/org/jetbrains/kotlin/konan/blackboxtest/NativeCodegenBoxTestGenerated.java

@@ -8980,6 +8980,12 @@ public class NativeCodegenBoxTestGenerated extends AbstractNativeCodegenBoxTest
                     public void testKt49294() throws Exception {
                         runTest("compiler/testData/codegen/box/coroutines/featureIntersection/funInterface/kt49294.kt");
                     }
+
+                    @Test
+                    @TestMetadata("kt50950.kt")
+                    public void testKt50950() throws Exception {
+                        runTest("compiler/testData/codegen/box/coroutines/featureIntersection/funInterface/kt50950.kt");
+                    }
                 }
 
                 @Nested