feat(weed.move): add a speed limit parameter of moving files (#3478)

* feat(weed.move): add a speed limit parameter of moving files

* fix(weed.move): set the default value of ioBytePerSecond to vs.compactionBytePerSecond

Co-authored-by: zhihao.qu <zhihao.qu@ly.com>

weed/pb/volume_server.proto

@@ -254,6 +254,7 @@ message VolumeCopyRequest {
     string ttl = 4;
     string source_data_node = 5;
     string disk_type = 6;
+    int64 io_byte_per_second = 7;
 }
 message VolumeCopyResponse {
     uint64 last_append_at_ns = 1;