[clang] [clang] simplify constant template parameter type deduction for partial ordering (PR #160433)

[Erich Keane via cfe-commits]

https://github.com/erichkeane approved this pull request.

I'm not positive exactly what is the effect of this, but I'm willing to ship it for now and see.

https://github.com/llvm/llvm-project/pull/160433