[Server] Update Oplog page to specify that it only adds an entry on success; link command pages as required

Description

Let's add a mention in the documentation where we precise what happen to replication for the different "delete" methods.
For example:

• deleteMany resulting in many entries put on the Oplog
• deleteXXX not finding any documents, not adding anything on the Oplog

Scope of changes

Add section on behavior of write commands that can fail (e.g. delete/update where query predicate finds no matching documents to modify) not adding oplog entries.

Add a section in the oplog docs to note that only write operations that succeed create an oplog entry.

Not in scope - wider audit of commands that generate oplog entries on success but not on failure.

Impact to Other Docs

MVP (Work and Date)

Resources (Scope or Design Docs, Invision, etc.)