Improve error message for std integer clamp() if min > max

[Dan54]

For #142309: change the error message for Ord::clamp() for std integer types if min > max to be more useful.

Message is now min > max. min = {min:?}, max = {max:?}

Also add #[track_caller] to clamp()

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[hkBst]

I think you should instead just improve the default implementation of clamp to have a better error message...

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[Dan54]

The nicer error message requires Self: Debug, which is not required by Ord. Adding the trait bound would be a breaking change.