[llvm] [Bazel][Clang Tidy] Include builtin headers with clang-tidy (PR #67626)

[via llvm-commits]

jathu wrote:

@aeubanks @rupprecht thanks for the update. The toolchain configuration seems like a great long term solution — I'm glad this is being developed internally and hope to see it in the public repos soon.

For now, as @rnk suggested, can we land this diff to allow clang-tidy to be used out of the box. We can update this once @rupprecht lands his changes.

https://github.com/llvm/llvm-project/pull/67626