feat: better support split deployment

[Julusian]

About Me

This pull request is posted on behalf of the BBC

Type of Contribution

This is a: Bug fix / Code improvement

New Behavior

This makes a couple of changes:

1. Fix the subscriptions to work when the header authentication is enabled in sofie. Note: this requires updating server-core-integration to compile.
2. Add more docker images to better cater to split deployment
3. Reworks the docker image CI to utilise build matrices to reduce duplication in the logic (this has not been tested because it is only set to run for tags)

Testing Instructions

Other Information

The docker image pushing needs some testing, but we are not setup to test this in the BBC fork, so I don't know how best to go about this

Status

• PR is ready to be reviewed.
• The functionality has been tested by the author.
• Relevant unit tests has been added / updated.
• Relevant documentation (code comments, system documentation) has been added / updated.