[clang-tools-extra] [clang-tidy] Fix false positive for cppcoreguidelines-pro-bounds-pointer-arithmetic (PR #127394)

[Baranov Victor via cfe-commits]

vbvictor wrote:

"Checking for the ability to merge automatically..." was for the past 6 hours, could you please rebase on fresh main again, maybe some conflicts cause it.

https://github.com/llvm/llvm-project/pull/127394