Added 'wMajorityWriteAvailabilityDate' field to 'electionCandidateMetrics' section of replSetGetStatus. It indicates when the 'new term' oplog entry was majority committed, or when we got back w: majjority write availability.
See DOCS-13053 for list of metrics
Track the time the new term oplog entry was majority committed in replSetStatus on primaries
Investigate changes in SERVER-41503: Track the target opTime for catchup in replSetStatus on primaries
Investigate changes in SERVER-41506: Track metrics associated with a node calling an election