[clang] [clang-tools-extra] [clang-tidy] [dataflow] Cache reference accessors for `bugprone-unchecked-optional-access` (PR #128437)

[Valentyn Yukhymenko via cfe-commits]

BaLiKfromUA wrote:

Could someone merge it?

Or do we need another reviewer? 

I don't have merge permissions :)

https://github.com/llvm/llvm-project/pull/128437