Add test with `ifort` compiler

[codecov[bot]]

Codecov Report

Attention: 4 lines in your changes are missing coverage. Please review.

Comparison is base (f47fe31) 74.15% compared to head (f8bd2ee) 74.19%.

Additional details and impacted files

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[sloede]

I'll leave fixing the actual ifort errors to you, @andrewwinters5000 @DavidAKopriva. Note that once the errors are fixed, please do not merge this PR immediately since I would like to verify first that caching the compiler files works as expected.

[sloede]

Good news: Intel has fixed the broken APT certificate and we can run tests with ifort again.

Bad news: the ifort tests fail with a segfault

[andrewwinters5000]

Okay, the valgrind jobs all still fail because something cannot be fetched properly using apt-get. @sloede have you encountered such issues recently in other repos?

[sloede]

Try adding a

sudo apt update

before the following line: https://github.com/trixi-framework/HOHQMesh/blob/f47fe3151fbf5dfd393de60ba37455d49e3b3b21/.github/workflows/ci.yml#L138

This might help fix/prevent these kind of errors (it's an oversight of mine).

[sloede]

Great job making HM more robust and portable 💪 Nothing to add from my side, so feel free to merge any time once you two are happy with it.