cubicweb #10837428 [bfss] path generation can choke on windows [open]

Somehow we see paths such as "C:\\Data\\workspace\\pagode\\cubes\\pago
de\\test\\data\\data\\bypass_data\\3360_data_C:-Data-workspace-pagode-cubes-pago
de-test-data-ffg-Sim_4h-spark_files.zip" being built.

They are invalid since this contain a ":", which is forbidden.

prioritynormal
typebug
done in<not specified>
closed by<not specified>