FIR checker: report uninitialized member/extension properties

compiler/testData/diagnostics/tests/properties/extensionPropertyMustHaveAccessorsOrBeAbstract.fir.kt

@@ -1,25 +0,0 @@
-val String.test1: Int
-var String.test2: Int
-
-var String.test3: Int; public set
-
-class C {
-    val String.test1: Int
-    var String.test2: Int
-    var String.test3: Int; public set
-}
-
-interface I {
-    val String.test1: Int
-    var String.test2: Int
-    var String.test3: Int; public set
-}
-
-abstract class A {
-    val String.test1: Int
-    var String.test2: Int
-    var String.test3: Int; public set
-
-    abstract val String.testA1: Int
-    abstract var String.testA2: Int
-}

compiler/testData/diagnostics/tests/properties/extensionPropertyMustHaveAccessorsOrBeAbstract.kt

@@ -1,3 +1,4 @@
+// FIR_IDENTICAL
 <!EXTENSION_PROPERTY_MUST_HAVE_ACCESSORS_OR_BE_ABSTRACT!>val String.test1: Int<!>
 <!EXTENSION_PROPERTY_MUST_HAVE_ACCESSORS_OR_BE_ABSTRACT!>var String.test2: Int<!>
 

compiler/testData/diagnostics/tests/properties/inferenceFromGetters/vars.fir.kt

@@ -5,7 +5,7 @@ var x
         q checkType { _<Int>() }
     }
 
-var noSetter
+<!MUST_BE_INITIALIZED!>var noSetter<!>
     get() = 1