release: Prepare oracle cloudware images for non-root builds

• Add metalog entries.
• Remove a stray entry in the package list.

Reviewed by: cperciva, emaste
MFC after: 3 days
Sponsored by: The FreeBSD Foundation
Sponsored by: Klara, Inc.
Differential Revision: https://reviews.freebsd.org/D52454

(cherry picked from commit 8f5791873a30122f72266cc44309933118d7fe36)