update tce to track v0.21.2 from upstream

[cadejager]

This code is pretty hard to compare. If you want to see the changes I made specifically I would suggest diffing this version with v0.21.2 from the upstream repos

# add and pull both remotes
git remote add pre git@github.com:lanl-preteam/spack.git
git pull pre
git remote add spack git@github.com:spack/spack.git
git pull spack

# checkout this branch
git checkout tce-2022-2-0.1_v0.21.2

# see the diff
git diff v0.21.2
# or
git difftool v0.21.2

If you want to see the changes that were made previously from the upstream repo:

git checkout tce-2022-2-0.1

git diff v0.19.0
# or
git difftool v0.19.0