[FIR IDE] HL API Better support of nullability and modality

compiler/testData/asJava/lightClasses/ideRegression/ImplementingCharSequenceAndNumber.kt

@@ -44,4 +44,6 @@ class Container {
             TODO("not implemented")
         }
     }
-}
+}
+
+// FIR_COMPARISON

compiler/testData/asJava/lightClasses/ideRegression/OverridingInternal.kt

@@ -13,4 +13,5 @@ class C : A(), I {
     override fun if() = 5
 }
 
-// LAZINESS:NoLaziness
+// LAZINESS:NoLaziness
+// FIR_COMPARISON