Load BSuite Environment (#933)

* added suite load for bsuite environment

* fixed observation shape bug in suite_bsuite and added alf_bsuite_wrapper

* Revert "Correct relative path import in py configurations (#928)"

This reverts commit 33c0ba21.

* removed alf_bsuite_wrapper and added method to suite_bsuite instead

* removed alf_bsuite_wrapper import from suite_bsuite file

* change loadbsuite to bsuitewrapper and edit docstrings

* edited description

* fixed PR review changes

* added check for max steps and change copyright year to this year