Make flakey network dependent tests optional #44

Job	Run time
pylint	13s
pre-commit	10s
test_on_old_Pythons (3.6)	5m 23s
test_on_old_Pythons (2.7)	6m 44s
test_on_old_Pythons (3.8)	4m 24s
test_on_old_Pythons (3.5)	5m 4s
test_on_old_Pythons (3.7)	5m 2s
run_tests (3.9, windows-latest)	3m 48s
run_tests (3.10, ubuntu-24.04)	3m 49s
run_tests (3.11, windows-latest)	3m 32s
run_tests (3.11, ubuntu-24.04)	3m 0s
run_tests (3.9, ubuntu-24.04)	3m 50s
run_tests (3.10, macos-latest)	2m 20s
run_tests (3.9, macos-latest)	2m 44s
run_tests (3.11, macos-latest)	1m 44s
run_tests (3.10, windows-latest)	3m 47s
run_tests (3.14.0-beta.4, windows-latest)	4m 37s
run_tests (3.14.0-beta.4, ubuntu-24.04)	3m 41s
run_tests (3.13, macos-latest)	1m 50s
run_tests (3.12, macos-latest)	1m 55s
run_tests (3.12, ubuntu-24.04)	3m 51s
run_tests (3.12, windows-latest)	3m 56s
run_tests (3.13, ubuntu-24.04)	3m 5s
run_tests (3.14.0-beta.4, macos-latest)	2m 39s
run_tests (3.13, windows-latest)	3m 29s
	1h 24m 37s

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