[cfe] Support forEffect and readOnlyReceiver in IndexSet

Change-Id: I17aeac01ad4330fe873e7fe693fd2fd6e427d120
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/124986
Reviewed-by: Jens Johansen <jensj@google.com>
Commit-Queue: Johnni Winther <johnniwinther@google.com>

Author: johnniwinther

pkg/front_end/lib/src/fasta/kernel/body_builder.dart

@@ -3428,11 +3428,11 @@ class BodyBuilder extends ScopeListener<JumpTarget>
       push(receiver.buildIndexedAccess(index, openSquareBracket));
     } else if (receiver is Expression) {
       push(IndexedAccessGenerator.make(
-          this, openSquareBracket, receiver, index, null, null));
+          this, openSquareBracket, receiver, index));
     } else {
       assert(receiver is Initializer);
       push(IndexedAccessGenerator.make(
-          this, openSquareBracket, toValue(receiver), index, null, null));
+          this, openSquareBracket, toValue(receiver), index));
     }
   }