* removed return_info, made info dict mandatory in reset
* tenatively removed deprecated seed api for environments
* added more info type checks to wrapper tests
* formatting/style compliance
* addressed some comments
* polish to address review
* fixed tests after merge, and added a test of the return_info deprecation assertion if found in reset signature
* some organization of env_checker tests, reverted a probably merge error
* added deprecation check for seed function in env
* updated docstring
* removed debug prints, tweaked test_check_seed_deprecation
* changed return_info deprecation check from assertion to warning
* fixes to vector envs, now should be correctly structured
* added some explanation and typehints for mockup depcreated return info reset function
* re-removed seed function from vector envs
* added explanation to _reset_return_info_type and changed the return statement