Support Opta -> kloppy -> SPADL

[probberechts]

The following issues have to be resolved before we can add support for converting Opta data that was loaded by kloppy to SPADL:

• [Opta] Ordering of events PySport/kloppy#267
• [Opta] fix deflected pass end coordinates and result PySport/kloppy#311
• [Opta] Allow missing value for qualifier 210 PySport/kloppy#328
• [Opta] Set bodypart=head for flick-ons PySport/kloppy#329