New hypre release 3.2.0

[rfalgout]

Hello @hypre-space/developers ,

We are doing a new release, so please hold off on making changes to the master branch until it is done.

Thanks!

-Rob

[rfalgout]

• Create a PR with title "Release 3.2.0" on branch release-3.2.0.
  • Create branch
  • Update CHANGELOG file with information regarding contents of this release.
  • Update config/version.sh with release number and (today's) date, then run config/update.sh and commit changes.
  • Create PR, reference this issue in the description, and add reviewers
• [MAJOR.MINOR] Update user and reference manuals.
• Check regression tests.
  • machine-tux
  • machine-tux-valgrind
  • machine-tux-spack
  • machine-mac (one compiler warning + the usual residual differences)
  • machine-rzhound
  • machine-matrix (Victor)
  • machine-tioga (Victor)
  • machine-aurora (Victor - Had an issue, rerunning now)
• Squash merge the PR.
• Tag repository with release number: git tag -a v3.2.0 -m "Release v3.2.0"
• Push tags to central repository: git push --tags
• Create a GitHub Release.
• On the CASC cluster, copy the GitHub release tar file to /usr/casc/hypre.
• On the RZ, copy the GitHub tar file to /usr/gapps/hypre (for backup reasons).
• Update Spack Package and create Spack pull request.
• Close the new release GitHub issue.

[rfalgout]

The release is done. The spack pull request is in review. Thanks!