Merge pull request dotnet/coreclr#12142 from BruceForstall/ReduceNoway

Convert some very common noway_assert to simple assert

Commit migrated from https://github.com/dotnet/coreclr/commit/06c08437ea63aae067d3a7510c00965864532ef7

diff --cc src/coreclr/src/jit/assertionprop.cpp
Simple merge

diff --cc src/coreclr/src/jit/flowgraph.cpp
Simple merge

diff --cc src/coreclr/src/jit/lsra.cpp
Simple merge

diff --cc src/coreclr/src/jit/morph.cpp
Simple merge