[K/N][IR][codegen] Made lazy init logic JVM-like

Now a file will be initialized only if a top level function has been called
rather than any function like was before the commit

kotlin-native/backend.native/tests/codegen/initializers/globalNotInitedAfterAccessingClassInternals.kt

@@ -0,0 +1,29 @@
+/*
+ * Copyright 2010-2021 JetBrains s.r.o. and Kotlin Programming Language contributors.
+ * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
+ */
+
+// FILE: lib.kt
+var z = false
+
+// FILE: lib2.kt
+import kotlin.test.*
+
+val x = foo()
+
+private fun foo(): Int {
+    z = true
+    return 42
+}
+
+class C {
+    fun bar() = 117
+}
+
+// FILE: main.kt
+import kotlin.test.*
+
+fun main() {
+    C().bar()
+    assertFalse(z)
+}