Call remote command directly if both source and target files are on the same FTP/SSH server

[TranceLove]

Is your feature request related to a problem? Please describe.
When both source and target files are on the same FTP/SSH server, we should make use of remote commands to copy/move files solely on the server, without ever touching the client side, to improve copy/move efficiency

Describe the solution you'd like
GenericCopyUtils.copy() may add a shortcut routine so that, when source and target URIs are FTP/SSH URIs and both are on the same host, call cp or mv on the remote directly

Describe alternatives you've considered
N/A

Additional context
Depends on #1347 - we should have better handling, parsing, less error-prone and less complicated implementation of NetCopyClientConnectionPool.ConnectionInfo before talking about this.