[Feat] Deprecate Python 3.8, add Python 3.12 + update CI/CD #1168

Job	Run time
agilerl-tutorial-test (3.9, AgileRL)	16m 1s
agilerl-tutorial-test (3.10, AgileRL)	15m 42s
tutorial-test (3.9, Tianshou)	3m 56s
agilerl-tutorial-test (3.11, AgileRL)	18m 30s
agilerl-tutorial-test (3.12, AgileRL)	22s
tutorial-test (3.9, CustomEnvironment)	11s
tutorial-test (3.9, CleanRL)	6m 21s
tutorial-test (3.9, SB3/kaz)	5m 11s
tutorial-test (3.9, SB3/waterworld)	7m 57s
tutorial-test (3.9, SB3/test)	2m 48s
tutorial-test (3.10, Tianshou)	5m 36s
tutorial-test (3.10, CustomEnvironment)	11s
tutorial-test (3.10, CleanRL)	7m 46s
tutorial-test (3.10, SB3/kaz)	6m 58s
tutorial-test (3.10, SB3/waterworld)	9m 18s
tutorial-test (3.10, SB3/test)	4m 24s
tutorial-test (3.11, Tianshou)	5m 25s
tutorial-test (3.11, CustomEnvironment)	13s
tutorial-test (3.11, CleanRL)	7m 47s
tutorial-test (3.11, SB3/kaz)	6m 46s
tutorial-test (3.11, SB3/waterworld)	9m 0s
tutorial-test (3.11, SB3/test)	4m 14s
tutorial-test (3.12, Tianshou)	5m 58s
tutorial-test (3.12, CustomEnvironment)	9s
tutorial-test (3.12, CleanRL)	7m 48s
tutorial-test (3.12, SB3/kaz)	6m 48s
tutorial-test (3.12, SB3/waterworld)	9m 47s
tutorial-test (3.12, SB3/test)	4m 25s
	2h 59m 32s

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