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

[Ben Dunkin via cfe-commits]

bdunkin wrote:

I will gladly add a new option, if that is deemed necessary. I just want to make sure that's the direction I should go. My experience has been it is very hard to take back an option once it has been released, so they should be added deliberately, and with careful consideration. 

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