[clang-tools-extra] [clangd] Allow --query-driver to match a dot-normalized form of the path (PR #66757)

[Nathan Ridge via cfe-commits]

HighCommander4 wrote:

See also some existing reports we have on file about other types of normalization:

  * https://github.com/clangd/clangd/issues/1518 (Windows shorthands like `PROGRA~1`)
  * https://github.com/clangd/clangd/issues/1605 (symlinks)
  * https://github.com/llvm/llvm-project/issues/62506 (double slashes)

https://github.com/llvm/llvm-project/pull/66757