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/anonymousObject.txt

@@ -22,17 +22,6 @@ public final class Test$b$1 {
     public method run(): void
 }
 
-@kotlin.Metadata
-final class Test$b$2 {
-    // source: 'anonymousObject.kt'
-    enclosing method Test.b()V
-    public final static field INSTANCE: Test$b$2
-    inner (anonymous) class Test$b$2
-    static method <clinit>(): void
-    method <init>(): void
-    public final method run(): void
-}
-
 @AllOpen
 @kotlin.Metadata
 public class Test {
@@ -40,8 +29,8 @@ public class Test {
     private final @org.jetbrains.annotations.NotNull field a: java.lang.Runnable
     inner (anonymous) class Test$a$1
     inner (anonymous) class Test$b$1
-    inner (anonymous) class Test$b$2
     public method <init>(): void
+    private final static method b$lambda$0(): void
     public method b(): void
     public @org.jetbrains.annotations.NotNull method getA(): java.lang.Runnable
 }