[Testing and benchmarking] Faster visco-elastic simulation test

[miguelmaso]

Testing if tests can run faster

[github-actions]

Benchmark Results (Julia v1)

Time benchmarks

	main	84db157...	main / 84db157...
Constitutive models/Visco-elastic Ψ	0.048 ± 0.028 ms	0.0473 ± 0.028 ms	1.01 ± 0.83
Constitutive models/Visco-elastic ∂Ψu	0.0625 ± 0.0051 ms	0.0618 ± 0.0039 ms	1.01 ± 0.1
Constitutive models/Visco-elastic ∂Ψuu	0.111 ± 0.016 ms	0.11 ± 0.015 ms	1.01 ± 0.21
Simulations/StaticMechanicalDirichlet	0.155 ± 0.014 s	0.158 ± 0.0089 s	0.979 ± 0.11
Simulations/StaticMechanicalNeumann	0.192 ± 0.0075 s	0.199 ± 0.0079 s	0.965 ± 0.054
Simulations/ViscoElastic	0.0468 h	58.1 s	2.9
Tensor algebra/δδ_λ_2d	30 ± 0 ns	30 ± 0 ns	1 ± 0
Tensor algebra/δδ_μ_2d	30 ± 0 ns	30 ± 0 ns	1 ± 0
time_to_load	2.48 ± 0.021 s	2.51 ± 0.0094 s	0.985 ± 0.0091

Memory benchmarks

	main	84db157...	main / 84db157...
Constitutive models/Visco-elastic Ψ	1.24 k allocs: 0.0782 MB	1.24 k allocs: 0.0782 MB	1
Constitutive models/Visco-elastic ∂Ψu	1.36 k allocs: 0.0904 MB	1.36 k allocs: 0.0904 MB	1
Constitutive models/Visco-elastic ∂Ψuu	2.31 k allocs: 0.155 MB	2.31 k allocs: 0.155 MB	1
Simulations/StaticMechanicalDirichlet	1.7 M allocs: 0.118 GB	1.7 M allocs: 0.118 GB	1
Simulations/StaticMechanicalNeumann	2.19 M allocs: 0.14 GB	2.19 M allocs: 0.14 GB	1
Simulations/ViscoElastic	2.72 G allocs: 192 GB	0.938 G allocs: 60.6 GB	3.16
Tensor algebra/δδ_λ_2d	0 allocs: 0 B	0 allocs: 0 B
Tensor algebra/δδ_μ_2d	0 allocs: 0 B	0 allocs: 0 B
time_to_load	0.149 k allocs: 11.1 kB	0.149 k allocs: 11.1 kB	1