[clang] [clang-tools-extra] [clang][lex] Store non-owning options ref in `HeaderSearch` (PR #132780)

[Michael Spencer via cfe-commits]

https://github.com/Bigcheese approved this pull request.

There's no point in having vague ownership here, so this lgtm.

https://github.com/llvm/llvm-project/pull/132780