[clang] [llvm] [NFC][analyzer] Extract bounds checking library (PR #202372)

[Donát Nagy via cfe-commits]

NagyDonat wrote:

@steakhal Gentle ping -- I would be grateful for a review of this patch.

(While I'm waiting for review here, I'm creating lots of routine node builder removal PRs, but those are clearly lower priority than this change. Here I'm curious about your opinion, while I could merge the straightforward NodeBuilder removal patches with verification and approval from @gamesh411 if you don't have capacity for reviewing them and are not opposed to this solution.)

https://github.com/llvm/llvm-project/pull/202372