We don't allow benchmarking only one package

[Razican]

In this commit, we removed the -p Boa from the command. This makes it portable for other things, but it removes the posibility to benchmark a certain package in a workspace.

This is causing all boa builds to fail. We should include an optional "package" parameter in the action configuration, and add it to the command line arguments.

[Razican]

This has been solved by cwd, but we should probably still allow using the -p benchmarking option.

[HalidOdat]

Should be fixed by #91