[clang] [clang-format] Add support for additional C++ declaration specifiers in QualifierOrder (PR #160853)

[Björn Schäpers via cfe-commits]

HazardyKnusperkeks wrote:

> you guys think this could be cherry picked into 21.x? I'm not to familiar with the release cycles

As far as I know there will be no 21 release anymore. And since there is now a release/22.x branch, and llvmorg-23-init tag, this will only land in 23.1.0, we don't pick features, only bug fixes.

https://github.com/llvm/llvm-project/pull/160853