Streamline json fixtures

[philnewm]

Is there an existing issue for this?

• I have searched the existing issues.

Please describe the enhancement you have in mind and explain what the current shortcomings are?

The currently defined pytest fixtures for github output - showing a json dictionary are rpetty redundant and hard to read
It might make sense to safe these as files and/or include data from a base template.

How would you imagine the implementation of the enhancement?

Either json files are able to include other json fiels or using yaml to merge multiple json files could be an efficient solution.
But the pytest should stay fast so it would be preferred to only use as much additional pyhton code as really neccessary.

Are there any labels you wish to add?

• I have added the relevant labels to the enhancement request.

Describe alternatives you've considered:

just having pure json files to be read by pytest fixtures.

Additional context:

No response