Add 'store' label to metric pd_cluster_status in 7.5. (#9865)#10060

SerjKol80 wants to merge 1 commit intotikv:release-7.5tikv/pd:release-7.5from

SerjKol80:sergey-kolosov/store-metricsSerjKol80/tidb-pd:sergey-kolosov/store-metricsCopy head branch name to clipboard