Drop support for Python 3.9 #5864

Job	Run time
build_windows (3.12)	44m 35s
build_windows (3.10)	44m 32s
build_windows (3.14)	44m 35s
build_windows (3.11)	42m 46s
build_linux (3.13)	34m 7s
build_linux (3.12)	33m 32s
build_windows (3.13)	45m 55s
build_linux (3.10)	34m 3s
build_linux (3.11)	31m 56s
build_linux (3.14)	34m 22s
test_linux (3.10, false, ubuntu-22.04)	10m 55s
test_linux (3.12, false, ubuntu-22.04)	10m 55s
array-api-conformity (3.10, false, ubuntu-22.04)	5m 26s
test_linux (3.14, false, ubuntu-22.04)	10m 32s
test_examples_linux (3.11, false, ubuntu-22.04)	9m 23s
test_linux (3.13, false, ubuntu-22.04)	10m 51s
test_linux (3.11, false, ubuntu-22.04)	10m 28s
upload_linux	-1s
test_windows (3.10, false, windows-latest)	15m 23s
test_windows (3.13, false, windows-latest)	14m 33s
test_windows (3.11, false, windows-latest)	14m 26s
test_windows (3.14, false, windows-latest)	15m 13s
test_windows (3.12, false, windows-latest)	19m 31s
Clean up anaconda packages	0s
upload_windows	0s
	8h 57m 58s

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