Add tests for streaming replication

[dAdAbird]

Need to spin up replica env and run basic INSERT, UPDATE, DELETE and COPY <table> FROM scenarios. See multi_insert tests for COPY ... FROM (https://github.com/Percona-Lab/pg_tde/blob/main/sql/multi_insert.sql) And insert_update_delete tests for INSERT, UPDATE, DELETE (https://github.com/Percona-Lab/pg_tde/blob/main/sql/insert_update_delete.sql)