Add pausing kb cluster database in namespace controller & fix get cost api #919

Job	Run time
image-build (database)	1m 52s
image-build (pay)	1m 59s
image-build (account)	2m 33s
resolve-modules	6s
image-build (minio)	1m 44s
image-build (launchpad)	1m 45s
image-build (exceptionmonitor)	2m 3s
save-sealos / save-sealos	19s
golangci-lint (./service/pay)	17s
golangci-lint (./service/launchpad)	18s
golangci-lint (./service/database)	19s
golangci-lint (./service/exceptionmonitor)	54s
golangci-lint (./service)	21s
golangci-lint (./service/account)	22s
build-cluster-image	0s
	14m 52s

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