Revert "[production] Update hashicorp/vault Docker tag to v1.16.3"

What

Rollback Vault to v1.16.2.

This reverts merge request !5159 (merged)

Why

ERROR: Job failed (system failure): resolving secrets: initializing Vault service: preparing authenticated client: authenticating Vault client: writing to Vault: api error: status code 400: audience claim found in JWT but no audiences bound to the role