Add upsert operation support in the set workload in jepsen tests. Currently, in the set workload, we do only set operations and no updates of the documents. Add support for updates and upserts in the wokloads.
|For Gerrit Dashboard: MB-37395|
|120008,3||MB-37395: Add upsert operations in the set workload This change adds support for upsert operations in the set workload. The tests will have an option to have updates in addition to the create operations in the workload.||master||jepsen.couchbase||Status: NEW||-1||-1|