Add FCV gating for the checkExistenceForDiffInsert oplog field in v6.0

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    • Type: Bug
    • Resolution: Won't Do
    • Priority: Major - P3
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    • Affects Version/s: None
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      In SERVER-79912, we added a new oplog entry field called checkExistenceForDiffInsert, which is appended to the oplog entry if the command being run is $_internalApplyOplogUpdate. This was backported to v6.0.

      In mixed version sets, this may cause v5.0 secondaries to fail to parse these new oplog entries. As a result, we should consider only appending the checkExistenceForDiffInsert field if the replica set's FCV is v6.0.

              Assignee:
              Unassigned
              Reporter:
              Xuerui Fa
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