Use orcalelinux7 instead of centos7 #28

Job	Run time
pre-release	5s
call-images-build / output-variable	7s
call-offline-build / offline-build	10m 54s
call-os-pkgs-build / matrix	5s
call-images-build / build-spray-imgs / output-variable	2s
call-images-build / build-spray-imgs / build-kubespray-image	6m 41s
call-os-pkgs-build / build (centos7, build/os-packages/Dockerfile.centos7)	2m 11s
call-os-pkgs-build / build (redhat7, build/os-packages/Dockerfile.redhat7)	2m 31s
call-os-pkgs-build / build (redhat8, build/os-packages/Dockerfile.redhat8)	40s
call-os-pkgs-build / build (redhat9, build/os-packages/Dockerfile.redhat9)	1m 8s
call-os-pkgs-build / build (rocky9, build/os-packages/Dockerfile.rocky9)	1m 31s
call-os-pkgs-build / build (kylinv10, build/os-packages/Dockerfile.kylinv10)	9m 0s
call-os-pkgs-build / build (openeuler22.03, build/os-packages/Dockerfile.openeuler22.03)	8m 15s
call-os-pkgs-build / build (oracle8, build/os-packages/Dockerfile.oracle8)	8s
call-os-pkgs-build / build (oracle9, build/os-packages/Dockerfile.oracle9)	14s
call-os-pkgs-build / build (tencent31, build/os-packages/Dockerfile.tencent31)	15s
call-os-pkgs-build / build (ubuntu2004, build/os-packages/Dockerfile.ubuntu2004)	21s
call-os-pkgs-build / build (ubuntu2204, build/os-packages/Dockerfile.ubuntu2204)	20s
call-images-build / build-kubean-imgs	0s
call-images-build / security-scanning	0s
sync-charts-and-api	0s
call-sha256sum-gen	0s
generate-release-notes	0s
get-environment	0s
build-docs	0s
call_speedup_offline_packages	0s
update_kubean_support_matrix	0s
	44m 28s

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