FIR checker: introduce top-level property checkers

Also, refactor property initializer checking so that those
newly added property checkers as well as member property checker
can share the same logic

compiler/testData/diagnostics/tests/delegatedProperty/inTrait.fir.kt

@@ -3,7 +3,7 @@
 import kotlin.reflect.KProperty
 
 interface T {
-  val a: Int by Delegate()
+  val a: Int by <!DELEGATED_PROPERTY_IN_INTERFACE!>Delegate()<!>
 }
 
 class Delegate {

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

@@ -15,7 +15,7 @@ expect class Foo(
 
     constructor() : this("no")
 
-    val prop: String = "no"
+    val prop: String = <!EXPECTED_PROPERTY_INITIALIZER!>"no"<!>
 
     var getSet: String
         get() = "no"

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

@@ -14,8 +14,8 @@ expect class Foo {
     var varWithGetSet: String
         get set
 
-    val backingFieldVal: String = "no"
-    var backingFieldVar: String = "no"
+    val backingFieldVal: String = <!EXPECTED_PROPERTY_INITIALIZER!>"no"<!>
+    var backingFieldVar: String = <!EXPECTED_PROPERTY_INITIALIZER!>"no"<!>
 
     val customAccessorVal: String
     get() = "no"
@@ -25,7 +25,7 @@ expect class Foo {
 
     lateinit var lateinitVar: String
 
-    val delegated: String by Delegate
+    val delegated: String by <!EXPECTED_DELEGATED_PROPERTY!>Delegate<!>
 }
 
 object Delegate { operator fun getValue(x: Any?, y: Any?): String = "" }

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

@@ -17,8 +17,8 @@ expect var varWithPlatformGetSet: String
     expect get
     expect set
 
-expect val backingFieldVal: String = "no"
-expect var backingFieldVar: String = "no"
+expect val backingFieldVal: String = <!EXPECTED_PROPERTY_INITIALIZER!>"no"<!>
+expect var backingFieldVar: String = <!EXPECTED_PROPERTY_INITIALIZER!>"no"<!>
 
 expect val customAccessorVal: String
     get() = "no"
@@ -30,7 +30,7 @@ expect const val constVal: Int
 
 expect lateinit var lateinitVar: String
 
-expect val delegated: String by Delegate
+expect val delegated: String by <!EXPECTED_DELEGATED_PROPERTY!>Delegate<!>
 object Delegate { operator fun getValue(x: Any?, y: Any?): String = "" }
 
 fun test(): String {

compiler/testData/diagnostics/tests/sourceCompatibility/noMultiplatformProjects.fir.kt

@@ -1,5 +1,5 @@
 expect fun foo1()
-expect val bar1 = 42
+expect val bar1 = <!EXPECTED_PROPERTY_INITIALIZER!>42<!>
 expect class Baz1
 
 actual fun foo2() = 42