unified-storage: expose memberlist cluster label config (#104643)

* tweak ringKey/ringName for consistency and allow us to configure memberlist cluster label config

* allow setting memberlist cluster label verification disabled field

---------

Co-authored-by: Peter Štibraný <pstibrany@gmail.com>

pkg/server/memberlist.go

@@ -41,6 +41,8 @@ func toMemberlistConfig(cfg *setting.Cfg) *memberlist.KVConfig {
 	memberlistKVcfg.Codecs = []codec.Codec{
 		ring.GetCodec(),
 	}
+	memberlistKVcfg.ClusterLabel = cfg.MemberlistClusterLabel
+	memberlistKVcfg.ClusterLabelVerificationDisabled = cfg.MemberlistClusterLabelVerificationDisabled
 	if cfg.MemberlistBindAddr != "" {
 		memberlistKVcfg.TCPTransport.BindAddrs = []string{cfg.MemberlistBindAddr}
 	}