Generate reference to existing class for builtin function references

Instead of non-existing `kotlin.KotlinPackage`, which led to
NoClassDefFoundError as soon as reflection tried to call getOwner on a
builtin callable reference, use a reference to a new physical class
`kotlin.jvm.internal.Intrinsics$Kotlin`. This will allow to support
KT-17151.

Note that for API version less than 1.4, this will still lead to
NoClassDefFoundError, but this is not worse than the current situation
where it happens anyway.

compiler/testData/codegen/box/callableReference/builtinFunctionReferenceOwner.kt

@@ -0,0 +1,12 @@
+// TARGET_BACKEND: JVM
+// IGNORE_BACKEND_FIR: JVM_IR
+// WITH_RUNTIME
+
+fun box(): String {
+    val f = Any?::toString
+
+    val owner = (f as kotlin.jvm.internal.CallableReference).owner as kotlin.jvm.internal.PackageReference
+    if (owner.jClass.name != "kotlin.jvm.internal.Intrinsics\$Kotlin") return "Fail: $owner"
+
+    return "OK"
+}