FIR: support lateinit properties

compiler/fir/tree/src/org/jetbrains/kotlin/fir/FirRenderer.kt

@@ -163,6 +163,9 @@ class FirRenderer(builder: StringBuilder) : FirVisitorVoid() {
             if (memberDeclaration.isConst) {
                 print("const ")
             }
+            if (memberDeclaration.isLateInit) {
+                print("lateinit ")
+            }
         }
 
         visitNamedDeclaration(memberDeclaration)

compiler/fir/tree/src/org/jetbrains/kotlin/fir/declarations/FirProperty.kt

@@ -16,6 +16,8 @@ import org.jetbrains.kotlin.fir.visitors.FirVisitor
 interface FirProperty : @VisitedSupertype FirDeclaration, FirCallableMember, FirVariable {
     val isConst: Boolean
 
+    val isLateInit: Boolean
+
     // Should it be nullable or have some default?
     val getter: FirPropertyAccessor
 

compiler/fir/tree/src/org/jetbrains/kotlin/fir/declarations/impl/FirMemberPropertyImpl.kt

@@ -28,6 +28,7 @@ class FirMemberPropertyImpl(
     platformStatus: FirMemberPlatformStatus,
     isOverride: Boolean,
     override val isConst: Boolean,
+    override val isLateInit: Boolean,
     receiverType: FirType?,
     returnType: FirType,
     override val isVar: Boolean,