Draft: Fixed shadowed variables + Scheme precompute cleanup
This is currently on pause because of scheme refactoring! - Note that there's a subset change that is !332 (merged) which reverted the scheme changes
All unittests are passing.
This also moves the precomputation of Barrett Mu for RNS to the utility.h but it may have a better home @ypolyakov please weigh in on this.
Edited by Jonathan Saylor