fix: veeam SOS API to higher layers (#18287)

- support populating usage info from scanner info
- support populating quota for the bucket via quota
  settings for the bucket

cmd/erasure-server-pool.go

@@ -795,6 +795,16 @@ func (z *erasureServerPools) GetObjectNInfo(ctx context.Context, bucket, object
 		return nil, err
 	}
 
+	// This is a special call attempted first to check for SOS-API calls.
+	gr, err = veeamSOSAPIGetObject(ctx, bucket, object, rs, opts)
+	if err == nil {
+		return gr, nil
+	}
+
+	// reset any error to 'nil' and any reader to be 'nil'
+	gr = nil
+	err = nil
+
 	object = encodeDirObject(object)
 
 	if z.SinglePool() {
@@ -924,6 +934,16 @@ func (z *erasureServerPools) GetObjectInfo(ctx context.Context, bucket, object s
 		return objInfo, err
 	}
 
+	// This is a special call attempted first to check for SOS-API calls.
+	objInfo, err = veeamSOSAPIHeadObject(ctx, bucket, object, opts)
+	if err == nil {
+		return objInfo, nil
+	}
+
+	// reset any error to 'nil', and object info to be empty.
+	err = nil
+	objInfo = ObjectInfo{}
+
 	object = encodeDirObject(object)
 
 	if z.SinglePool() {