Fix static typing with Matplotlib 3.8 #9044

Job	Run time
detect ci trigger	6s
Event File	2s
ubuntu-latest py3.9	7m 57s
ubuntu-latest py3.11	8m 27s
macos-latest py3.9	12m 7s
macos-latest py3.11	22m 57s
windows-latest py3.9	17m 50s
windows-latest py3.11	19m 31s
ubuntu-latest py3.9 bare-minimum	2m 28s
ubuntu-latest py3.9 min-all-deps	8m 2s
ubuntu-latest py3.10 all-but-dask	5m 47s
ubuntu-latest py3.10 flaky	10m 20s
	1h 55m 34s

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