[clang] [NFC][analyzer] OOB test consolidation I: no-outofbounds.c (PR #126539)

[Donát Nagy via cfe-commits]

NagyDonat wrote:

**Meta:** can we ensure that commits that modify files in `clang/test/Analysis` (i.e. the static analyzer lit test directory) are tagged as "clang: static analyzer"? I will have a few follow-up commits like this and don't want to spam that label.

https://github.com/llvm/llvm-project/pull/126539