upgrades to mypy 1.6 #3045

Job	Run time
changes	6s
cluster_tools (multiprocessing, 3.11)	3m 51s
cluster_tools (multiprocessing, 3.10)	3m 17s
webknossos_linux (3.11, 1)	18m 22s
cluster_tools (multiprocessing, 3.9)	3m 17s
webknossos_linux (3.11, 2)	17m 38s
webknossos_linux (3.11, 3)	15m 23s
cluster_tools (multiprocessing, 3.8)	3m 25s
webknossos_linux (3.10, 1)	12m 11s
cluster_tools (slurm, 3.11)	6m 50s
webknossos_linux (3.10, 2)	14m 4s
cluster_tools (slurm, 3.10)	6m 44s
cluster_tools (slurm, 3.9)	7m 10s
webknossos_linux (3.10, 3)	16m 16s
cluster_tools (slurm, 3.8)	6m 45s
webknossos_linux (3.9, 1)	11m 21s
cluster_tools (kubernetes, 3.11)	21m 27s
webknossos_linux (3.9, 2)	7m 56s
cluster_tools (kubernetes, 3.10)	5m 23s
webknossos_linux (3.9, 3)	5m 24s
cluster_tools (kubernetes, 3.9)	5m 42s
webknossos_linux (3.8, 1)	2m 28s
cluster_tools (kubernetes, 3.8)	6m 15s
webknossos_linux (3.8, 2)	1s
webknossos_linux (3.8, 3)	1s
docs	1s
pypi_and_gh_release	1s
webknossos_cli_docker	1s
complete	2s
	3h 21m 22s

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