Improve a vector implementation to support alignment and non-temporal tores (#93296)

* Improve a vector implementation to support alignment and non-temporal stores

* Fix a build error and mark a couple methods as AggressiveInlining

* Fix the remaining block count computation

* Ensure overlapping for small data on the V256/512 is handled

* Ensure we only go down the vectorized path when supported for netstandard

Author: tannergooding