add requeue and QOS slurm options

[marianna13]

1. Not all clusters support QOS and requeue options so we make them optional.
2. launch_pickled_pipeline might not work all the time (e.g. if you use a local fork of datatrove)

[guipenedo]

Hi! Thanks for the changes, they look great!
Was just unsure as to why having a local fork would make the launch pipeline command not work. On my system installing from local source (pip install . -e) adds the command to the environment without issue, does this not happen for you?

[marianna13]

Ok pip install . works for launch_pickled_pipeline

[guipenedo]

Thank you for the PR, I made a small change and fixed the style. Merged!