MATCH: Add `~MAX(~X, Y)` pattern: [PR96694]

MATCH: Add `~MAX(~X, Y)` pattern: [PR96694]

This adds `~MAX(~X, Y)` and `~MIN(~X, Y)` patterns
that are like the `~(~a & b)` and `~(~a | b)` patterns
and allows to reduce the number of ~ by 1.

OK? Bootstrapped and tested on x86_64-linux-gnu with no regressions.

	PR tree-optimization/96694

gcc/ChangeLog:

	* match.pd (`~MAX(~X, Y)`, `~MIN(~X, Y)`): New patterns.

gcc/testsuite/ChangeLog:

	* gcc.dg/tree-ssa/minmax-24.c: New test.