Add parallel row copy with support for consistent checkpoints (no gaps) #1589

Job	Run time
docker-tests (mariadb:10.11.18)	6m 54s
docker-tests (mysql:8.4.3)	6m 30s
docker-tests (mariadb:10.6.27)	6m 10s
docker-tests (mariadb:11.4.12)	4m 44s
docker-tests (mysql:5.7.41)	6m 31s
docker-tests (percona/percona-server:8.0.41-32)	6m 22s
docker-tests (mariadb:10.5.29)	5m 48s
docker-tests (mariadb:11.8.8)	4m 28s
docker-tests (mysql:8.0.41)	6m 11s
	53m 38s

Provide feedback