[Durability] cbstats ops_create value is not consistent between sync and non-sync writes

Build: 6.5.0-3556

Scenario-1 (SyncWrite):

1. Two node cluster - 1 Couchbase bucket (replica=1)
2. Create 1 document with durability=MAJORITY 

Scenario-2 (Non SyncWrite):

1. Two node cluster - 1 Couchbase bucket (replica=1)
2. Create 1 document without durability

Observation:

While fetching cbstats vbucket-details in both the cases, ops_create value is not matching. Same thing is observed for "ops_update" field during update case as well.

In Sync Write case:

vb_971:ops_create:                       2

In Non Sync Write case:

vb_971:ops_create:                       1

Expectation:

Stats should be consistent between sync and async writes

Document uploaded: