Drop support for Python 3.8 #10934

Job	Run time
build packages	14s
code-quality	1m 8s
unit test / python 3.9	52s
unit test / python 3.10	55s
unit test / python 3.11	54s
unit test / python 3.12	1m 6s
verify packages / python 3.9 / ubuntu-latest / whl	23s
verify packages / python 3.9 / ubuntu-latest / gz	18s
verify packages / python 3.10 / ubuntu-latest / whl	21s
verify packages / python 3.10 / ubuntu-latest / gz	20s
verify packages / python 3.11 / ubuntu-latest / whl	24s
verify packages / python 3.11 / ubuntu-latest / gz	23s
verify packages / python 3.12 / ubuntu-latest / whl	32s
verify packages / python 3.12 / ubuntu-latest / gz	27s
verify packages / python 3.9 / macos-12 / whl	27s
verify packages / python 3.9 / macos-12 / gz	36s
verify packages / python 3.10 / macos-12 / whl	31s
verify packages / python 3.10 / macos-12 / gz	30s
verify packages / python 3.11 / macos-12 / whl	32s
verify packages / python 3.11 / macos-12 / gz	30s
verify packages / python 3.12 / macos-12 / whl	46s
verify packages / python 3.12 / macos-12 / gz	40s
verify packages / python 3.9 / windows-latest / whl	1m 28s
verify packages / python 3.9 / windows-latest / gz	1m 12s
verify packages / python 3.10 / windows-latest / whl	1m 43s
verify packages / python 3.10 / windows-latest / gz	1m 43s
verify packages / python 3.11 / windows-latest / whl	1m 26s
verify packages / python 3.11 / windows-latest / gz	1m 51s
verify packages / python 3.12 / windows-latest / whl	1m 7s
verify packages / python 3.12 / windows-latest / gz	1m 55s
	25m 14s

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