Declare subset collections as such for collection patching

[tmadlener]

BEGINRELEASENOTES

• Mark all subset collections as such in the full REC collections content to avoid spurious crashes.
  • See also the documentation changes in key4hep/k4EDM4hep2LcioConv#109
• Sort the collection list alphabetically

ENDRELEASENOTES

See key4hep/k4MarlinWrapper#215

• Needs Make it possible to create subset collections during collection patching LCIO#201

[tmadlener]

@dudarboh with these changes in place, I can run over all events of the sample that triggered the original issue.