method_of_moments: consistently use uppercases for NaN, Inf, IRFs

matlab/+mom/check_irf_matching_file.m

matlab/+mom/default_option_mom_values.m

matlab/+mom/display_comparison_moments_irfs.m

matlab/+mom/graph_comparison_irfs.m

matlab/+mom/matched_irfs_blocks.m

matlab/+mom/mode_compute_irf_matching.m

matlab/+mom/objective_function.m

matlab/+mom/print_info_on_estimation_settings.m

matlab/+mom/run.m

matlab/+mom/standard_errors.m