[clang] [Clang][Sema] Use the correct lookup context when building overloaded 'operator->' in the current instantiation (PR #104458)

[Cassie Jones via cfe-commits]

porglezomp wrote:

@sdkrystian sorry to bother, do you have that change to re-land it?

https://github.com/llvm/llvm-project/pull/104458