B2OC: Convert (most) builders and a subset of lines to ThOr

1. Convert almost everything in basic_builder, d_builder and cbaryon_builder from LoKi to ThOr.
   • neutral builders not converted
2. Convert part of b_builder (make_b2x function) to ThOr
3. Only book a subset of B2OC Hlt2 lines and make sure they're functioning for further tests.

needs to be tested and merged with !936 (merged)