JVM IR: change generation scheme of property $delegate methods

Generate $delegate method as instance method in
PropertyReferenceDelegationLowering, and remove dispatch receiver later
in MakePropertyDelegateMethodsStatic. The method needs to be static to
be non-overridable (see delegateMethodIsNonOverridable.kt), and public
to be accessible in reflection.

Otherwise we generated incorrect IR where a static function accessed an
instance field of the containing class, which failed in multiple places
including LocalDeclarationsLowering.

 #KT-48350 Fixed

compiler/testData/codegen/bytecodeText/optimizedDelegatedProperties/delegateToAnother.kt

@@ -35,11 +35,11 @@ fun local() {
 // 0 private final( static)? Lkotlin/reflect/KMutableProperty[0-2]; [xyz]m?\$delegate
 // 2 private final( static)? LC; [xyz]m?\$receiver
 // 0 LOCALVARIABLE [xyz]m? Lkotlin/reflect/KMutableProperty[0-2];
-// 12 static get[XYZ]m?\$delegate
+// 12 public( static)? get[XYZ]m?\$delegate
 
 // JVM_TEMPLATES
 // Not optimized, references created as classes and stored in fields:
 // 16 extends kotlin/jvm/internal/MutablePropertyReference[0-2]Impl
 // 12 private final( static)? Lkotlin/reflect/KMutableProperty[0-2]; [xyz]m?\$delegate
 // 4 LOCALVARIABLE [xyz]m? Lkotlin/reflect/KMutableProperty[0-2];
-// 0 static get[XYZ]m?\$delegate
+// 0 get[XYZ]m?\$delegate