[clang] [clang-format] Allow array alignment on non-rectangular arrays (PR #143781)

[Ben Dunkin via cfe-commits]

bdunkin wrote:

My apologies for disappearing for a while on this change. I had to change focus at work for a while, but I am now able to pick this back up. I was working on rebasing to the latest on the main branch on Friday, and I hope to push a rebased branch today or tomorrow.

https://github.com/llvm/llvm-project/pull/143781