[clang] [Clang][counted-by] Bail out of visitor for LValueToRValue cast (PR #125571)

[Bill Wendling via cfe-commits]

bwendling wrote:

This change didn't affect the tests, which is either good or bad, depending on your point of view. I assume that it's okay because we're looking for a `MemberExpr`, and they don't appear to have the LValueToRValue cast, at least for the instances we care about. I'm actively working to see if I can find interesting conditions where we do get the cast.

https://github.com/llvm/llvm-project/pull/125571