[PA-A][util] add new EDY_plot.

...ests/PA-A/models/stokesdarcy/ffpm_stokesdarcy_p_final.csv

...-A/models/stokesdarcy/ffpm_stokesdarcy_velocity_final.csv

BayesValidRox/tests/PA-A/post_plot_PAPER.py

BayesValidRox/tests/PA-A/util/EDY_plot.py

BayesValidRox/tests/PA-A/util/postDist_visualization.py

BayesValidRox/tests/PA-A/util/validExpDesign_correction.py

BayesValidRox/tests/PA-A/util/vel_diagnostics.py