[clang] Rework the printing of attributes (PR #87281)

[Kim Gräsman via cfe-commits]

kimgr wrote:

@erichkeane Thanks! Let me just see if I can bisect it to this commit; I don't have any evidence yet, this PR was just the only significant change to `DeclPrinter.cpp` in the past few days. I need a little while to rebuild my local Clang tree with and without the patch.

https://github.com/llvm/llvm-project/pull/87281