[#1209] cli: Add --quiet flag to healthcheck command

Signed-off-by: Alexander Chuprov <a.chuprov@yadro.com>

cmd/frostfs-cli/internal/commonflags/flags.go

@@ -53,6 +53,10 @@ const (
 
 	AwaitFlag      = "await"
 	AwaitFlagUsage = "Wait for the operation to complete"
+
+	QuietFlag          = "quiet"
+	QuietFlagShorthand = "q"
+	QuietFlagUsage     = "Print nothing and exit with non-zero code on failure"
 )
 
 // Init adds common flags to the command: