test: DLE "logical" method (pg_dump) and 1TB database

1. DLE: test dump/restore (formats: plain text, custom, directory) for large-sized database.

   • PostgreSQL on AWS EC2 instance
   • Amazon RDS
   • Amazon Aurora

2. Describe recommendations to reduce time for logicalRestore job.

3. Test dump/restore on the ext4 file system (for comparison with ZFS)

4. Test pgcopydb - https://github.com/dimitri/pgcopydb