This PR upgrades smt from legacy np.random.RandomState to new random generator np.random.Generator.

Breaking change: Passing a np.random.RandomState does not work anymore. The following classes are impacted: LHS, Random, DesignSpace and all kriging-based surrogate models via "random_state" option.

If a random_state parameter was used with an integer it still works but is deprecated, the new seed parameter is added to handle passing an integer or a np.random.Generator. The random_state will be removed in future releases, use seed instead.

Breaking change: EGO and MixedInteger applications were directly upgraded, their random_state option was replaced by a seed option.

Note: smt now requires pyDOE3 >= 1.5.0