Use Work Queue or TaskVine as Wrapper Engine

PARSL complained to me that if I wanted to explicitly request CPUs I should use the "Work Queue" executor, from the Cooperative Computing Lab from Notre Dame university, in the US.

It does not look awefully updated (last update was three months ago in a single file of the repo). But it seems simple enough that we could use it.

So, instead of using of using PARSL, it might be a good idea to just use directly Work Queue.

In the same repo there is also another tool called Task Vine, which seems to do the same.