[clang] [llvm] Intrinsic: introduce minimumnum and maximumnum (PR #93841)

[YunQiang Su via cfe-commits]

wzssyqa wrote:

TODO: implement for architectures that don't have `fmin/fmax` instructions:

This is the example of MIPS pre-R6:

```
mins:
        .set    noreorder
        .set    nomacro
        mtc1    $0,$f1
        add.s   $f0,$f12,$f1
        add.s   $f13,$f13,$f1

        c.un.s  $fcc0,$f0,$f0
        movt.s  $f0,$f13,$fcc0
        c.un.s  $fcc0,$f13,$f13
        movt.s  $f13,$f0,$fcc0
        c.ult.s $fcc0,$f13,$f0
        movt.s  $f0,$f13,$fcc0
        jr      $31
```

https://github.com/llvm/llvm-project/pull/93841
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