[GSTG] Provision a new cluster for PG14 for main db

It is a requirement to provision a new database cluster to migrate the current main db to version PG14.

The provisioning request here add's the package of PG14 and TF needed for the upgrade.

Acceptance criteria:

• Provision a new database cluster to migrate the main DB to PG 14 👉 production#8722 (closed)