various CI improvements

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 56.61%. Comparing base (64a8811) to head (7ccafb0).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #501 +/- ## ========================================== - Coverage 62.71% 56.61% -6.11% ========================================== Files 29 29 Lines 2229 2222 -7 ========================================== - Hits 1398 1258 -140 - Misses 831 964 +133 ```

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[ArnoStrouwen]

@thazhemadam do you know what the issue is here? https://github.com/SciML/LinearSolve.jl/actions/runs/9061500275/job/24893374532?pr=501#step:8:36 The documentation link in the error message is not even working for me.

[ArnoStrouwen]

I'll need some help fixing this deprecation: https://github.com/SciML/LinearSolve.jl/actions/runs/9061500275/job/24893376530?pr=501#step:6:2073

[ChrisRackauckas]

@fredrikekre "LoadError: mpiexec() is deprecated, use the non-do-block form" do you know the fix here?

[fredrikekre]

diff --git a/test/hypretests.jl b/test/hypretests.jl
index c41079c1..da7e7e3a 100644
--- a/test/hypretests.jl
+++ b/test/hypretests.jl
@@ -168,7 +168,5 @@ test_interface(HYPREAlgorithm(HYPRE.PCG(comm)), Pl = HYPRE.BoomerAMG())

 # Test MPI execution
 mpitestfile = joinpath(@__DIR__, "hypretests_mpi.jl")
-mpiexec() do mpi
-    r = run(ignorestatus(`$(mpi) -n 2 $(Base.julia_cmd()) $(mpitestfile)`))
-    @test r.exitcode == 0
-end
+r = run(ignorestatus(`$(mpiexec()) -n 2 $(Base.julia_cmd()) $(mpitestfile)`))
+@test r.exitcode == 0