data loading is taking more time in aws runs with 7.0.1/2 builds

In our aws perf runs, we noticed it took more time to load data with 7.0.1/2 builds. Compared to 7.0.0 build, it takes almost 30 more minutes to load 500K docs. 

build: 7.0.0-5302

job: http://perf.jenkins.couchbase.com/job/Cloud-Tester/315/

logs:

https://s3-us-west-2.amazonaws.com/perf-artifacts/jenkins-Cloud-Tester-315/ec2-3-83-79-7.compute-1.amazonaws.com.zip

https://s3-us-west-2.amazonaws.com/perf-artifacts/jenkins-Cloud-Tester-315/ec2-44-195-41-77.compute-1.amazonaws.com.zip

https://s3-us-west-2.amazonaws.com/perf-artifacts/jenkins-Cloud-Tester-315/ec2-54-236-37-42.compute-1.amazonaws.com.zip

2021-08-17T19:28:46 [INFO] Running load phase: {

…

2021-08-17T19:43:45 [INFO] All tasks are done

...

2021-08-17T19:43:48 [INFO] Monitoring DCP queues: bucket-1

2021-08-17T19:43:48 [INFO] ep_dcp_replica_items_remaining reached 0

2021-08-17T19:43:49 [INFO] ep_dcp_other_items_remaining reached 0

2021-08-17T19:43:49 [INFO] Monitoring replica count match: bucket-1

2021-08-17T19:43:50 [INFO] curr_items: 499803, replica_curr_items: 499792

2021-08-17T19:43:52 [INFO] curr_items: 500000, replica_curr_items: 500000

build: 7.0.2-6511

job: http://perf.jenkins.couchbase.com/job/Cloud-Tester/314/

logs:

https://s3-us-west-2.amazonaws.com/perf-artifacts/jenkins-Cloud-Tester-314/ec2-18-204-43-57.compute-1.amazonaws.com.zip

https://s3-us-west-2.amazonaws.com/perf-artifacts/jenkins-Cloud-Tester-314/ec2-3-235-156-247.compute-1.amazonaws.com.zip

https://s3-us-west-2.amazonaws.com/perf-artifacts/jenkins-Cloud-Tester-314/ec2-3-239-225-176.compute-1.amazonaws.com.zip

2021-08-17T17:46:41 [INFO] Running load phase: {

…

2021-08-17T18:28:44 [INFO] All tasks are done

...

2021-08-17T18:28:55 [INFO] Monitoring DCP queues: bucket-1

2021-08-17T18:28:55 [INFO] ep_dcp_replica_items_remaining reached 0

2021-08-17T18:28:58 [INFO] ep_dcp_other_items_remaining reached 0

2021-08-17T18:28:58 [INFO] Monitoring replica count match: bucket-1

2021-08-17T18:29:00 [INFO] curr_items: 500000, replica_curr_items: 500000