Refactor Electro and ThermoElectro models

[miguelmaso]

Features

• Added ThermoElectro coupled model based on multiplicative decomposition
• Replaced the function _getCoupling(obj.electro, obj.mechano) with model.electro()
• Replaced initialize_state with Gridap.CellState
• Added signature with CellState(visco, F, args...) to allow a custom initial visous strain
• Added ConstantCvLaw and ConstantEnergyLaw

[github-actions]

Benchmark Results (Julia v1)

Time benchmarks

	main	01bc6a6...	main / 01bc6a6...
Constitutive models/Visco-elastic Ψ	0.0481 ± 0.029 ms	0.0478 ± 0.028 ms	1.01 ± 0.84
Constitutive models/Visco-elastic ∂Ψu	0.0542 ± 0.0017 ms	0.0539 ± 0.0019 ms	1.01 ± 0.047
Constitutive models/Visco-elastic ∂Ψuu	0.102 ± 0.016 ms	0.102 ± 0.016 ms	0.999 ± 0.22
Simulations/StaticMechanicalDirichlet	0.134 ± 0.0067 s	0.134 ± 0.0072 s	0.999 ± 0.073
Simulations/StaticMechanicalNeumann	0.128 ± 0.012 s	0.13 ± 0.013 s	0.982 ± 0.13
Simulations/ViscoElastic	18.3 s	18.4 s	0.997
Tensor algebra/Cofactor	0.06 ± 0.001 μs	0.06 ± 0.01 μs	1 ± 0.17
Tensor algebra/Det(A)Inv(A')	0.12 ± 0.01 μs	0.12 ± 0.011 μs	1 ± 0.12
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	2.76 ± 0.0051 s	2.76 ± 0.011 s	0.999 ± 0.0045

Memory benchmarks

	main	01bc6a6...	main / 01bc6a6...
Constitutive models/Visco-elastic Ψ	1.24 k allocs: 0.0777 MB	1.24 k allocs: 0.0777 MB	1
Constitutive models/Visco-elastic ∂Ψu	1.29 k allocs: 0.0826 MB	1.29 k allocs: 0.0826 MB	1
Constitutive models/Visco-elastic ∂Ψuu	2.25 k allocs: 0.149 MB	2.25 k allocs: 0.149 MB	1
Simulations/StaticMechanicalDirichlet	1.51 M allocs: 0.108 GB	1.51 M allocs: 0.108 GB	1
Simulations/StaticMechanicalNeumann	1.48 M allocs: 0.0927 GB	1.48 M allocs: 0.0927 GB	1
Simulations/ViscoElastic	0.327 G allocs: 20.6 GB	0.327 G allocs: 20.6 GB	1
Tensor algebra/Cofactor	1 allocs: 0.0781 kB	1 allocs: 0.0781 kB	1
Tensor algebra/Det(A)Inv(A')	4 allocs: 0.25 kB	4 allocs: 0.25 kB	1
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