[AB#43722] internal media messages are now stored to inbox directly

[AxTrusov]

Pull Request

Prerequisites

• The PR is targeting the right branch (dev for features and master for
  releases)
• potential release notes to the PR description added
• potential testing notes to the PR description added
• appropriate labels for the PR applied

Description

With the integration of transactional inbox/outbox pattern, some messages that are only circulating within a service started taking long round-trips like this: source handler -> outbox -> RMQ -> inbox -> destination handler
This change makes sure that all internal messages are written directly to inbox, so it now looks like this: source handler -> inbox -> destination handler

Testing notes

• Make sure the following media service operations work as before:
  • Publishing and unpublishing of entities (both single and bulk)
  • Bulk deletion of entities
  • Operations on snapshots (both single and bulk)
  • ingest with images, videos, and localizations