Customization of the Robot Framework launch command line from Squash TM

This User Story is the application of https://gitlab.com/groups/henixdevelopment/squash/-/epics/25 to Robot Framework.
See that epic for the details of the code and documentation changes to be performed.

(Once done, we will have to do some tests with the --include and --exclude flags to see if there are some problems and we will document some limitations if necessary.)