Bug: The `openjd run` command does not handle relative paths correctly

[mwiebe]

Expected Behaviour

1. If a relative path is a default parameter to a job template, it should treat the path as relative to the location of the job template.
2. If a relative path is provided as a job parameter (e.g. -p InputSceneFile=../path/to/car_render.blend, it should treat the path as relative to the current CWD.

Current Behaviour

The relative path is untouched in how the job is run, so it shows up as a relative path in the template substitution. That means that in both the case of a job template parameter default, and a job parameter provided externally, the path is treated as relative to whatever the CWD happens to be when the path is used inside the job template script.

Reproduction Steps

No response

Code Snippet

No response