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

[Ben Dunkin via cfe-commits]

bdunkin wrote:

> You can't change existing tests, you need an option if you want to pad with spaces

It is unclear to me if this should be considered a bug fix, or a new feature. Surely requiring new options are not required for every bug fix.

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