Add another environment variable with the number of the parallel task and the degree of parallelization

I want to use the plugin to parallel a task which will not depend on the test splits. but will use it's own parallelization, I need each instance to know "you are X out of N", I want to do it with this plugin because I need the way this plugin copies the files back to the main job.
So I suggest adding 2 environment vars for this.

WDYT ?

Thanks,
Omer