[clang] [clang-format] Add AlignAfterOpenBracketOptions (PR #108332)

[Björn Schäpers via cfe-commits]

https://github.com/HazardyKnusperkeks commented:

I don't think this is the way to go, or at least not with this name.

How about going the `Custom` way?

https://github.com/llvm/llvm-project/pull/108332