fix: compute total cache usage on any new cache policy opt

Signed-off-by: Justin Chadwell <[email protected]>

cache/manager.go

@@ -1045,7 +1045,7 @@ func (cm *cacheManager) pruneOnce(ctx context.Context, ch chan client.UsageInfo,
 	}
 
 	totalSize := int64(0)
-	if opt.MaxStorage != 0 {
+	if opt.MaxStorage != 0 || opt.MinStorage != 0 || opt.Free != 0 {
 		du, err := cm.DiskUsage(ctx, client.DiskUsageInfo{})
 		if err != nil {
 			return err