Don't create KClass and KPackage instances in <clinit>

This proved to be a fragile technique, which probably doesn't even improve
performance in most cases but has lots of unexpected problems: unconditional
initialization of reflection classes, increasing the size of the bytecode, bugs
with <clinit> in annotations on JVM 6, inability to support conversion of a
class from Kotlin to Java without recompiling clients which use it
reflectively, etc.

compiler/testData/codegen/bytecodeListing/annotations/JvmSynthetic.txt

@@ -1,10 +1,8 @@
 @kotlin.jvm.internal.KotlinClass Example {
-    public synthetic field $kotlinClass: kotlin.reflect.KClass
     private synthetic @org.jetbrains.annotations.NotNull field prop: java.lang.String
     private field prop2: int
     private synthetic field useSite: int
     private field useSite2: int
-    method <clinit>(): void
     public @org.jetbrains.annotations.NotNull method getProp(): java.lang.String
     public synthetic method getProp2(): int
     public synthetic method setProp2(p0: int): void