treat initial vdisk status as ok (#8150)

Author: vporyadke

ydb/core/health_check/health_check.cpp

@@ -1984,9 +1984,9 @@ class TSelfCheckRequest : public TActorBootstrapped<TSelfCheckRequest> {
 
         switch (vDiskInfo.GetVDiskState()) {
             case NKikimrWhiteboard::EVDiskState::OK:
+            case NKikimrWhiteboard::EVDiskState::Initial:
                 context.ReportStatus(Ydb::Monitoring::StatusFlag::GREEN);
                 break;
-            case NKikimrWhiteboard::EVDiskState::Initial:
             case NKikimrWhiteboard::EVDiskState::SyncGuidRecovery:
                 context.IssueRecords.clear();
                 context.ReportStatus(Ydb::Monitoring::StatusFlag::YELLOW,