[FIR] Render nullability in type renderer, not in fir renderer

idea/testData/fir/multiModule/basicWithJavaFakeOverride/extraDump.java.txt

@@ -1,5 +1,5 @@
 public open class A<T> : R|kotlin/Any| {
-    public open operator fun foo(t: R|ft<T, T?>|!): R|ft<T, T?>|!
+    public open operator fun foo(t: R|ft<T, T?>!|): R|ft<T, T?>!|
 
     public constructor<T>(): R|A<T>|
 

idea/testData/fir/multiModule/basicWithJavaFakeOverride/jvm/simpleFakeOverride.txt

@@ -11,7 +11,7 @@ FILE: simpleFakeOverride.kt
         }
 
         public final fun test(): R|kotlin/Unit| {
-            R|FakeOverride</A.foo: R|ft<Some, Some?>|!>|(R|/Some.Some|())
+            R|FakeOverride</A.foo: R|ft<Some, Some?>!|>|(R|/Some.Some|())
         }
 
     }