[Test] Save IR bytecode dumps from BytecodeListingHandler to .ir.txt file instead of _ir.txt

This is needed to keep consistency with other dumps and to allow
  test helper plugin to recognize those dumps

plugins/allopen/testData/bytecodeListing/superClassAnnotation.ir.txt

@@ -0,0 +1,60 @@
+@java.lang.annotation.Retention(value=RUNTIME)
+@kotlin.Metadata
+public annotation class AllOpen {
+    // source: 'superClassAnnotation.kt'
+}
+
+@kotlin.Metadata
+public class BaseImpl {
+    // source: 'superClassAnnotation.kt'
+    public method <init>(): void
+    public method baseImplMethod_ShouldBeOpen(): void
+}
+
+@kotlin.Metadata
+public class BaseImpl2_ShouldBeOpen {
+    // source: 'superClassAnnotation.kt'
+    private final @org.jetbrains.annotations.NotNull field baseImpl2Property_ShouldBeOpen: java.lang.String
+    public method <init>(): void
+    public method baseImpl2Method_ShouldBeOpen(): void
+    public @org.jetbrains.annotations.NotNull method getBaseImpl2Property_ShouldBeOpen(): java.lang.String
+}
+
+@AllOpen
+@kotlin.Metadata
+public abstract class Base_ShouldBeOpen {
+    // source: 'superClassAnnotation.kt'
+    public method <init>(): void
+    public method baseMethod(): void
+}
+
+@kotlin.Metadata
+public final class Intf$DefaultImpls {
+    // source: 'superClassAnnotation.kt'
+    public static method intfMethod(@org.jetbrains.annotations.NotNull p0: Intf): void
+    public final inner class Intf$DefaultImpls
+}
+
+@AllOpen
+@kotlin.Metadata
+public interface Intf {
+    // source: 'superClassAnnotation.kt'
+    public abstract method intfMethod(): void
+    public final inner class Intf$DefaultImpls
+}
+
+@kotlin.Metadata
+public class IntfImpl {
+    // source: 'superClassAnnotation.kt'
+    public method <init>(): void
+    public method intfImplMethod_ShouldBeOpen(): void
+    public method intfMethod(): void
+    public final inner class Intf$DefaultImpls
+}
+
+@kotlin.Metadata
+public class IntfImpl2_ShouldBeOpen {
+    // source: 'superClassAnnotation.kt'
+    public method <init>(): void
+    public method intfImpl2Method_ShouldBeOpen(): void
+}