precompile less when running tests

[ranocha]

This sets preferences to precompile less stuff in OrdinaryDiffEq.jl when running our tests. This hopefully should reduce the total CI time for us.

[sloede]

Sounds reasonable (if it works - is it recognized by OrdinaryDiffEq?)

[ranocha]

Here are some timings of precompilation (without coverage) from earlier CI runs

System	Precompile time	Link
CPU: Intel(R) Xeon(R) CPU E5-2673 v4 @ 2.30GHz	897 seconds	https://github.com/trixi-framework/Trixi.jl/actions/runs/4950586929/jobs/8854401715#step:7:891
CPU: Intel(R) Xeon(R) CPU E5-2673 v4 @ 2.30GHz	825 seconds	https://github.com/trixi-framework/Trixi.jl/actions/runs/4950586929/jobs/8854401965#step:7:891
CPU: Intel(R) Xeon(R) CPU E5-2673 v3 @ 2.40GHz	840 seconds	https://github.com/trixi-framework/Trixi.jl/actions/runs/4950586929/jobs/8854401383#step:7:891
CPU: Intel(R) Xeon(R) Platinum 8171M CPU @ 2.60GHz	923 seconds	https://github.com/trixi-framework/Trixi.jl/actions/runs/4950586929/jobs/8854402231#step:7:891
CPU: Intel(R) Xeon(R) Platinum 8272CL CPU @ 2.60GHz	797 seconds	https://github.com/trixi-framework/Trixi.jl/actions/runs/4950586929/jobs/8854401614#step:7:891
CPU: Intel(R) Xeon(R) Platinum 8272CL CPU @ 2.60GHz	756 seconds	https://github.com/trixi-framework/Trixi.jl/actions/runs/4950586929/jobs/8854401824#step:7:891
CPU: Intel(R) Xeon(R) Platinum 8370C CPU @ 2.80GHz	709 seconds	https://github.com/trixi-framework/Trixi.jl/actions/runs/4950586929/jobs/8854401499#step:7:891
CPU: Intel(R) Xeon(R) Platinum 8370C CPU @ 2.80GHz	729 seconds	https://github.com/trixi-framework/Trixi.jl/actions/runs/4950586929/jobs/8854402487#step:7:891

And here are some results from this PR

System	Precompile time	Link
CPU: Intel(R) Xeon(R) CPU E5-2673 v4 @ 2.30GHz	762 seconds	https://github.com/trixi-framework/Trixi.jl/actions/runs/4958533178/jobs/8871521584#step:7:889
CPU: Intel(R) Xeon(R) CPU E5-2673 v4 @ 2.30GHz	749 seconds	https://github.com/trixi-framework/Trixi.jl/actions/runs/4958533178/jobs/8871522223#step:7:889
CPU: Intel(R) Xeon(R) Platinum 8171M CPU @ 2.60GHz	705 seconds	https://github.com/trixi-framework/Trixi.jl/actions/runs/4958533178/jobs/8871522325#step:7:889
CPU: Intel(R) Xeon(R) Platinum 8272CL CPU @ 2.60GHz	645 seconds	https://github.com/trixi-framework/Trixi.jl/actions/runs/4958533178/jobs/8871521438#step:7:889
CPU: Intel(R) Xeon(R) Platinum 8370C CPU @ 2.80GHz	596 seconds	https://github.com/trixi-framework/Trixi.jl/actions/runs/4958533178/jobs/8871521836#step:7:889

Both are from Linux Ci runners. It looks like a net win here?