[CMSP-763] Update docs to reflect accurate multisite installation options

[jazzsequence]

Summary

Enable Object Cache Pro for WordPress - Removes the multisite installation section and updates multisite notes.

Effect

The documentation for installing OCP on WordPress multisite was inaccurate. This update removes the inaccuracies and links to OCP docs for more specific details.

Dependencies and Timing

Release:

• When ready
• After date: $DATE

---

Post Launch

Do not remove - To be completed by the docs team upon merge:

• Redirect /old-path/ => /new-path/ (if applicable)
• Include/exclude pages ^ respectively within docs search service provider (if applicable)
• For Heroes - add a props post to the discussion board.
• Remove from the project board

[jazzsequence]

Preview