CP-9713 Update developer.delphix.com with support for additional mounts in AppData dSource

[SumoSourabh]

Problem

The review contains document changes related to

• 4.1.0 release.
• multinode implementation for dSources.

Testing Done

The changes are available at https://sumosourabh.github.io/virtualization-sdk/. All links worked. Checked via linkcheck.

Screenshots of the changes

[SumoSourabh]

Should we also highlight the reason for having both mount and mounts i.e. to support backward compatibility?

• I think the design decisions can be left out from the documentation. We have already added when to use mount and mounts.