[clang-format] Feature Request: Add ability to break\insert new line after attribute if it contains a message

[kridenberg]

Some attributes can contain an optional message, for example:
[[nodiscard(xxx)]] or [[deprecated(xxx)]]. In that case, it will be very handy to have the ability to insert a break after the attribute if it contains a message. Maybe a new option for BreakAfterAttributes can be added for this?
Right now it can be mitigated by hiding those attributes with common messages into some macros, but nevertheless, the feature may be useful.

[llvmbot]

@llvm/issue-subscribers-clang-format

Author: Oleksandr Syrotiuk (kridenberg)

Some attributes can contain an optional message, for example: [[nodiscard(xxx)]] or [[deprecated(xxx)]]. In that case, it will be very handy to have the ability to insert a break after the attribute if it contains a message. Maybe a new option for BreakAfterAttributes can be added for this? Right now it can be mitigated by hiding those attributes with common messages into some macros, but nevertheless, the feature may be useful.