Add no hyper reduction mode to Mixed Nonlinear Diffusion

[axla-io]

This PR adds a no hyper reduction mode for Mixed Nonlinear Diffusion with a command line argument, similar to the nonlinear elasticity example. It also adds some small performance improvements and guardrails for no hyper reduction mode in nonlinear elasticity.

Reproductive example for mixed nonlinear diffusion (has been tested for predictive example too)

# Offline phase:
./mixed_nonlinear_diffusion -p 1 -offline -id 0 -sh 0.2

# Merge phase:
./mixed_nonlinear_diffusion -p 1 -merge -ns 1

# Comparison data:
./mixed_nonlinear_diffusion -p 1 -offline -id 1 -sh 0.2

# Online phase:
./mixed_nonlinear_diffusion -online -rrdim 16 -rwdim 16 -p 1 -sh 0.2 -no-hyp

./mixed_nonlinear_diffusion -online -rrdim 16 -rwdim 16 -p 1 -sh 0.2 -nldim 2 -hrtype deim

Reproductive example for nonlinear elasticity (has been tested for predictive example too)

# Offline phase:
./nonlinear_elasticity_global_rom -offline -dt 0.01 -tf 5.0 -s 14 -vs 100 -sc 1.0 -id 0

# Merge phase:
./nonlinear_elasticity_global_rom -merge -ns 1 -dt 0.01 -tf 5.0

# Comparison data:
./nonlinear_elasticity_global_rom -offline -dt 0.01 -tf 5.0 -s 14 -vs 100 -sc 1.0 -id 1

# Online phase:
./nonlinear_elasticity_global_rom -online -dt 0.01 -tf 5.0 -s 14 -vs 100 -no-hyp -rvdim 40 -rxdim 10 -sc 1.0
./nonlinear_elasticity_global_rom -online -dt 0.01 -tf 5.0 -s 14 -vs 100 -hyp -hrtype qdeim -rvdim 40 -rxdim 10 -hdim 71 -nsr 100 -sc 1.0