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

[via cfe-commits]

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@@ -2976,6 +3091,18 @@ static TemplateDeductionResult ConvertDeducedTemplateArguments(
       continue;
     }
 
+    // [temp.deduct.partial]p12 - When partial ordering, it's ok for template
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cor3ntin wrote:

```suggestion
    // [C++26][temp.deduct.partial]p12 - When partial ordering, it's ok for template
```

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