Postgres compatibility

Supported versions of Postgres for PEM 10.x:

	Monitored Instance	Backend Instance
EDB Postgres Advanced Server (EPAS)	14, 15, 16, 17, 18	14, 15, 16, 17, 18
PostgreSQL (PG)	14, 15, 16, 17, 18	14, 15, 16, 17, 18
EDB Postgres Extended Server (PGE)	14, 15, 16, 17, 18	14, 15, 16, 17, 18