Our local runner environments have been upgraded to use the gnu12 stack from ohpc by default. This PR updates the github actions CI to run the tests with the new environment, including
Updating mfem paths where necessary (to use an up-to-date mfem, built with gnu12 stack)
Fixing the gslib check in configure.ac (changes in test env uncovered fact that previous check was broken)
For the cuda build, force gnu9, since our existing cuda installation doesn't support gnu12
Our local runner environments have been upgraded to use the gnu12 stack from ohpc by default. This PR updates the github actions CI to run the tests with the new environment, including
configure.ac
(changes in test env uncovered fact that previous check was broken)