Add an option in stics_wrapper_options to get the plant name/file in stics_wrapper results

[sbuis]

get_sim function allows to retrieve the name of the plant or the plant file and provide a plant column on the df outputed including this information.

However, it is not used in stcis_wrapper => would be good to provide an option for that.

To reduce the cost of reading the whole usms.xml file, maybe it could be retrieved in the txt files?