2.9.1 release

[vicentebolea]

Instructions for performing an ADIOS2 release:

• Make sure that the milestone for 2.9.1 has no pending issues/PRs.
• Update your remotes
  git fetch origin git fetch github #if needed
• Create a branch that updates the version

git checkout -b bump-release-version origin/release_29

• Add Commit that updates the version in the repo

git grep --name-only 2.9.0 | xargs -n1 sed -i 's/2.9.0/2.9.1/g'
git commit -am 'Bump version to v2.9.1'
git push

• Create PR (BASE to master if release_29 does not exists; otherwise release_29)
• Ask for review
• Merge PR
• Create Tag commit git tag -a v2.9.1 the_merge_commit
• Create Release in GitHub page
  • Use the following script for getting the PR of this release
    • ./scripts/developer/create-changelog.sh v2.9.1 v2.9.0
  • Copy its content to the release description
• Create a git merge -s ours release_29 commit in master and push manually.
• Submit a PR in Spack that adds this new version of ADIOS (if not RC mark this new version as preferred) ADIOS2: update to latest release spack/spack#39257
• Submit a PR in Conda that adds this new version of ADIOS (if not RC mark this new version as preferred) ADIOS2: update to latest release spack/spack#39257
• Write an announcement in the ADIOS-ECP mail-list
  (https://groups.google.com/a/kitware.com/g/adios-ecp)