Tests: adjust test data for bytecode listing tests

- remove obsolete `IGNORE_BACKEND: JVM` directives
- move contents of .ir.txt files to the corresponding .txt

plugins/allopen/testData/bytecodeListing/superClassAnnotation.txt

@@ -49,6 +49,7 @@ public class IntfImpl {
     public method <init>(): void
     public method intfImplMethod_ShouldBeOpen(): void
     public method intfMethod(): void
+    public final inner class Intf$DefaultImpls
 }
 
 @kotlin.Metadata