core: extend postgres configuration (#5138)

Add postgres configuration options to control
TLS verification and client certificates.

lifecycle/wait_for_db.py

@@ -29,6 +29,10 @@ while True:
             password=CONFIG.y("postgresql.password"),
             host=CONFIG.y("postgresql.host"),
             port=int(CONFIG.y("postgresql.port")),
+            sslmode=CONFIG.y("postgresql.sslmode"),
+            sslrootcert=CONFIG.y("postgresql.sslrootcert"),
+            sslcert=CONFIG.y("postgresql.sslcert"),
+            sslkey=CONFIG.y("postgresql.sslkey"),
         )
         conn.cursor()
         break