HDDS-12873. Improve ContainerData statistics synchronization.

[szetszwo]

What changes were proposed in this pull request?

 /** parameters for read/write statistics on the container. **/
  private final AtomicLong readBytes;
  private final AtomicLong writeBytes;
  private final AtomicLong readCount;
  private final AtomicLong writeCount;
  private final AtomicLong bytesUsed;
  private final AtomicLong blockCount;

In ContainerData, the fields shown above are for statistics. The synchronization in current code is incorrect when updating multiple fields.

It is better to create a class for them and then synchronize the new class.

What is the link to the Apache JIRA

HDDS-12873

How was this patch tested?

By updating existing tests