Add openmpi install to CI

[dustinswales]

This PR adds to the CCPP Prebuild CI test to install open-mpi v4.1.6, which is now a requirement for CCPP.

[dustinswales]

@grantfirl @mkavulich @scrasmussen
Just a heads up.
When the CCPP SCM updates its CCPP Framework hash, all of the CI tests will break until this addition is added to those tests.

[climbfuji]

That's great! I know this is pedantic but we'll probably want to include that in one of the upcoming ufs prs, even though this clearly doesn't affect anything but CI.

[gold2718]

👍

[dustinswales]

@mkavulich This should not have been merged into main. All PRs targeting the main branch need to go through host model testing before getting the okay to merge.

[climbfuji]

I created ufs-community/ufs-weather-model#2216 to include this change. No need to roll back I think because this PR shouldn't affect anything in the UFS. But let's try to avoid merging into main w/o full testing (see also @peverwhee's issue about creating a develop branch with a smaller testing harness)