[clang] [clang] check deduction consistency when partial ordering function templates (PR #100692)

[Matheus Izvekov via cfe-commits]

mizvekov wrote:

@alexfh That's a bug in the patch, thanks for reporting.

This patch fixes it: https://github.com/llvm/llvm-project/pull/107972

https://github.com/llvm/llvm-project/pull/100692