[clang] [clang-format] Hanlde qualified type name for `QualifierAlignment` (PR #125327)

[Owen Pan via cfe-commits]

owenca wrote:

> Seems to also work for top-level types (`::int_64_t constexpr x{123};` works correctly)

It didn't work either.



https://github.com/llvm/llvm-project/pull/125327