charts,salt,build: Bump ingress-nginx chart to 4.15.0 #4813

Job	Run time
changed-files	16s
build-devcontainer / build-and-publish-devcontainer	32s
unit_tests_crd_client_generator	0s
build_integration_container_nginx	0s
unit_tests_ui	0s
build-shell-ui	0s
unit_tests_shell_ui	0s
integration_tests_ui	0s
lint	4m 49s
unit_tests_salt	2m 7s
build / build-shell-ui / shell-ui	1m 34s
build / build-devcontainer / build-and-publish-devcontainer	17s
build-docs	-1s
unit_tests_lib_alert_tree	0s
unit_tests_storage_operator	0s
unit_tests_metalk8s_operator	0s
build / build	15m 32s
build / build-docs / build-devcontainer / build-and-publish-devcontainer	18s
build / build-docs / docs	2m 20s
build / write-final-status	16s
e2e-tests / multi-node-e2e / multi-node	1h 56m 8s
e2e-tests / single-node-e2e / single-node	1h 13m 19s
e2e-tests / single-node-e2e / destroy-single-node-cluster	7m 13s
e2e-tests / multi-node-e2e / destroy-multi-node-cluster	7m 28s
write-final-status	10s
	3h 52m 18s

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