Added 'numCatchUpOps' field to 'electionCandidateMetrics' section of replSetGetStatus.
See DOCS-13053 for list of metrics.
Track the number of ops during catchup in replSetStatus on primaries
Investigate changes in SERVER-41503: Track the target opTime for catchup in replSetStatus on primaries
Investigate changes in SERVER-41507: Track the time the new term oplog entry was written in replSetStatus on primaries
Investigate changes in SERVER-41506: Track metrics associated with a node calling an election