Remove support for Python 3.8 #1151

Job	Run time
Build docs	1m 28s
pylint (py3.8)	3m 1s
Code formatting (Black)	21s
pytest (py3.8/linux)	9m 7s
pylint (py3.9)	2m 48s
Check Spelling	9s
pytest (py3.8/win64)	14m 36s
pylint (py3.10)	2m 52s
pytest (py3.8/macos-x86_64)	13m 27s
pylint (py3.11)	2m 41s
pytest (py3.8/macos)	6m 52s
pylint (py3.12)	2m 56s
pytest (py3.9/linux)	8m 30s
pytest (py3.9/win64)	12m 18s
pytest (py3.9/macos-x86_64)	12m 58s
pytest (py3.9/macos)	6m 46s
pytest (py3.10/linux)	13m 19s
pytest (py3.10/win64)	19m 35s
pytest (py3.10/macos-x86_64)	17m 26s
pytest (py3.10/macos)	8m 52s
pytest (py3.11/linux)	10m 28s
pytest (py3.11/win64)	16m 22s
pytest (py3.11/macos-x86_64)	14m 3s
pytest (py3.11/macos)	7m 16s
pytest (py3.12/linux)	8m 30s
pytest (py3.12/win64)	14m 37s
pytest (py3.12/macos-x86_64)	13m 9s
pytest (py3.12/macos)	7m 31s
Upload coverage report (Codecov)	18s
	4h 12m 16s

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