Downgrade Node.js setup to version 16 in Cypress requirements script #3482

Job	Run time
changed-files	11s
lint	4m 12s
unit_tests_ui	1m 55s
unit_tests_shell_ui	31s
build-shell-ui	0s
build-docs	0s
unit_tests_crd_client_generator	0s
unit_tests_metalk8s_operator	0s
unit_tests_storage_operator	0s
unit_tests_salt	0s
build_integration_container_nginx	2m 17s
unit_tests_lib_alert_tree	0s
build / build	16m 28s
build / build-docs / docs	2m 3s
build / build-shell-ui / shell-ui	49s
integration_tests_ui	6m 34s
build / write-final-status	7s
e2e-tests / multi-node-e2e / multi-node	1h 25m 28s
e2e-tests / single-node-e2e / single-node	1h 20m 51s
e2e-tests / single-node-e2e / destroy-single-node-cluster	3m 8s
e2e-tests / multi-node-e2e / destroy-multi-node-cluster	3m 0s
write-final-status	7s
	3h 27m 41s

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