Document the possibility to implement session caching for Spring Integration SMB adapters

[mrnst]

The documentation for Spring Integration SMB Support should explain how to implement caching of the SMB session using a CachingSessionFactory, just like the documentation of other adapters like FTP already does.

[artembilan]

This is related to StackOverflow question: https://stackoverflow.com/questions/79455120/spring-integration-multiple-file-transfer-to-remote-file-system-with-delay