Previously, we would ignore the candidate with the non-smartcasted
receiver if they have the same symbol.
Now we prefer them when they're visible or when the smart cast changes
the nullability.
They were accidentally fixed with `[FIR] Process all overridden members from intersection scopes`
commit, which itself introduced incorrect behavior, which was properly
fixed with ... commit. So KT-64081 started to appear again
Kirill Rakhman