[CK] Refactor GPU verification kernel to gather error stats on GPU (#3551)

* Refactor GPU verification kernel to gather erorr stats on GPU

* Check if result is all zero

* non-negative error count doesn't need custom Atomics

* Remove unnecessary AtomicMaxFloat function

* Simpler warp reduction, remove passed flag

* Move verification header to include

* Fix header path in test

* Fix block reduction loop