Use kwargs for common argument parsing

[ejseqera]

We already support using kwargs in the tower class for constructing command line arguments to _tw_run(), we can extend this to support workspace, name, and etc to avoid having to specify the the cli option followed by the argument for each invocation of a tw subcommand.

For example,
Currently we do something like:

tw.launch("--name", "my_pipeline_name", "--compute-env", "my_compute_env", "--workspace", "my_workspace")

Whereas we can do:

tw.launch(name="my_pipeline_name", compute_env="my_compute_env", workspace="my_workspace")

This would simplify alot of the helper functions we have for the cli interface as well.