FIR: Improve rendering for type operators

compiler/fir/resolve/testData/resolve/builtins/lists.txt

@@ -8,8 +8,8 @@ FILE: lists.kt
 
     }
     public final fun R|kotlin/collections/List<kotlin/String>|.convert(): R|MyStringList| {
-        ^convert as/R|MyStringList|(this#)
+        ^convert (this# as R|MyStringList|)
     }
     public final fun ret(l: R|kotlin/collections/MutableList<kotlin/String>|): R|MyMutableStringList| {
-        ^ret as/R|MyMutableStringList|(this#)
+        ^ret (this# as R|MyMutableStringList|)
     }

compiler/fir/resolve/testData/resolve/genericFunctions.txt

@@ -2,7 +2,7 @@ FILE: genericFunctions.kt
     public abstract interface Any {
     }
     <reified T : R|Any|> public final inline fun R|Any|.safeAs(): R|T|? {
-        ^safeAs as?/R|T|(this#)
+        ^safeAs (this# as? R|T|)
     }
     public abstract class Summator {
         public constructor(): super<R|kotlin/Any|>()