remove old debian versions from testing #880

Job	Run time
pack_pip	13s
pack_deb	2m 39s
pack_rpm (fedora, 34)	1m 11s
pack_rpm (fedora, 35)	1m 48s
pack_rpm (fedora, 36)	1m 7s
run_tests_pip_package_windows	6m 58s
run_tests_pip_package_linux	2m 28s
run_tests_rpm (fedora, 34)	5m 10s
run_tests_rpm (fedora, 35)	5m 15s
run_tests_rpm (fedora, 36)	5m 11s
run_tests_deb (ubuntu, focal)	2m 59s
run_tests_deb (ubuntu, jammy)	2m 51s
run_tests_deb (debian, bookworm)	52s
publish_deb	0s
publish_rpm	1s
publish_pip	1s
	38m 44s

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