Add clear instructions on how to *run* QCG pilot jobs and configure them

[djgroen]

Suggestion on the FabSim3 documentation

Provide a clear and concise description of what is missing or what you need to be added in the FabSim3 documentation

[sweetmixture]

@arindamsaha1507 and I found it on Archer2 when PILOT_JOB is used, the default 'cray-python' module could clash with user's miniconda environment (invoking h5py not found error while running FabUQCampaign with PILOT_JOB mode). This could be solved by commenting out the 'cray-python' loading line in machine.yml.

Thanks!