Adding state function to multiwalker #984

Job	Run time
tutorial-test (3.8, Tianshou)	3m 34s
tutorial-test (3.8, CustomEnvironment)	28s
tutorial-test (3.8, CleanRL)	5m 29s
tutorial-test (3.8, SB3/kaz)	4m 34s
tutorial-test (3.8, SB3/waterworld)	8m 30s
tutorial-test (3.8, SB3/connect_four)	3m 13s
tutorial-test (3.8, SB3/test)	2m 5s
tutorial-test (3.8, AgileRL)	13m 47s
tutorial-test (3.9, Tianshou)	3m 12s
tutorial-test (3.9, CustomEnvironment)	42s
tutorial-test (3.9, CleanRL)	5m 28s
tutorial-test (3.9, SB3/kaz)	4m 33s
tutorial-test (3.9, SB3/waterworld)	7m 47s
tutorial-test (3.9, SB3/connect_four)	3m 2s
tutorial-test (3.9, SB3/test)	2m 7s
tutorial-test (3.9, AgileRL)	14m 42s
tutorial-test (3.10, Tianshou)	3m 42s
tutorial-test (3.10, CustomEnvironment)	30s
tutorial-test (3.10, CleanRL)	7m 3s
tutorial-test (3.10, SB3/kaz)	5m 30s
tutorial-test (3.10, SB3/waterworld)	8m 0s
tutorial-test (3.10, SB3/connect_four)	3m 7s
tutorial-test (3.10, SB3/test)	2m 4s
tutorial-test (3.10, AgileRL)	14m 48s
tutorial-test (3.11, Tianshou)	4m 0s
tutorial-test (3.11, CustomEnvironment)	53s
tutorial-test (3.11, CleanRL)	6m 59s
tutorial-test (3.11, SB3/kaz)	4m 40s
tutorial-test (3.11, SB3/waterworld)	7m 52s
tutorial-test (3.11, SB3/connect_four)	3m 0s
tutorial-test (3.11, SB3/test)	2m 1s
tutorial-test (3.11, AgileRL)	14m 29s
	2h 51m 51s

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