[JVM IR] Do not generate clinit as enclosing method.

The JVM and newer Android runtimes treats that the same as if
there is no enclosing method. However, older Android runtimes
for Android 5 and 6 throw exceptions on reflective access
and even older runtimes have different behavior. To avoid
those issues, exclude <clinit> from enclosing method attributes.

^ KT-48754 Fixed

compiler/testData/codegen/bytecodeListing/delegatedProperty/delegatedPropertiesInCompanionObject_ir.txt

@@ -43,7 +43,7 @@ public final class H1 {
 @kotlin.Metadata
 final class H2$Companion$property$2 {
     // source: 'delegatedPropertiesInCompanionObject.kt'
-    enclosing method H2.<clinit>()V
+    enclosing class H2
     public final static field INSTANCE: H2$Companion$property$2
     inner (anonymous) class H2$Companion$property$2
     static method <clinit>(): void