[clang] [clang-format] Change LLVM style to BreakAfterAttributes == ABS_Leave (PR #70360)

[Owen Pan via cfe-commits]

owenca wrote:

This would change the default for every other predefined style, which might be ok if there's no mention of breaking after C++11 attributes in those styles.

https://github.com/llvm/llvm-project/pull/70360