FIR checker: report (expected|unnecessary) lateinit

compiler/testData/diagnostics/tests/multiplatform/headerClass/memberPropertyKinds.fir.kt

@@ -23,7 +23,7 @@ expect class Foo {
     get() = "no"
     set(value) {}
 
-    lateinit var lateinitVar: String
+    <!EXPECTED_LATEINIT_PROPERTY!>lateinit<!> var lateinitVar: String
 
     val delegated: String by <!EXPECTED_DELEGATED_PROPERTY!>Delegate<!>
 }

compiler/testData/diagnostics/tests/multiplatform/topLevelProperty/differentKindsOfProperties.fir.kt

@@ -28,7 +28,7 @@ expect var customAccessorVar: String
 
 expect const val constVal: Int
 
-expect lateinit var lateinitVar: String
+expect <!EXPECTED_LATEINIT_PROPERTY!>lateinit<!> var lateinitVar: String
 
 expect val delegated: String by <!EXPECTED_DELEGATED_PROPERTY!>Delegate<!>
 object Delegate { operator fun getValue(x: Any?, y: Any?): String = "" }