`strokeArcs` on data import

[signedav]

Currently we have no option to set strokeArcs on data import. Because it's not needed when the target column is no curved geometry anyway.

Behavior

1. No --strokeArcs on --schemaImport: creates curve geometry columns (if defined in INTERLIS)
2. --strokeArcs on --schemaImport: creates no curve geometry columns (even if defined in INTERLIS)
3. No --strokeArcs on --import of arcs to no curve geometry columns: successful, and geometries are segmented
4. --strokeArcs on --import of arcs to no curve geometry columns: successful, and geometries are segmented
5. --strokeArcs on --import of arcs to curve geometry columns: successful, and geometries are segmented

• 1 and 2 is implemented.
• 3 and 4 needs no implementation.
• 5 is not implemented. If it's required it should be as well implemented in the processing tools

[signedav]

I guess the setting should be somewhere here then.