[JIT] ARM64 - Optimize `x < 0` and `x >= 0` (#83176)

[JIT] ARM64 - Optimize `x < 0` and `x >= 0` (#83176)

* Initial work that allows optimizing x < 0

* Few tweaks

* Optimized x < 0 and x >= 0 for conditionals

* Removed old commented code. Switched tbz and tbnz

* Simplified

* Fix build

* Check for possible interference

* Reverse

* Check invariant-range

* Cleanup

* Cleanup

* Handle new JCMP flags in gtReverseCond

* Comment update

* Remove extra flags

* Simplify further

* Fix warning

* Update src/coreclr/jit/lower.cpp

Co-authored-by: Jakob Botsch Nielsen <Jakob.botsch.nielsen@gmail.com>
* Fix warning

* Fixing assert

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Co-authored-by: Jakob Botsch Nielsen <Jakob.botsch.nielsen@gmail.com>