Add MaterialEntity to BasisOfRecord

[thomasstjerne]

See gbif/portal-feedback#5752

Please add MaterialEntity to https://github.com/gbif/gbif-api/blob/master/src/main/java/org/gbif/api/vocabulary/BasisOfRecord.java

[CecSve]

The vocabulary is migrated to the vocabulary server now: https://registry.gbif.org/vocabulary/BasisOfRecord and has up-to-date concepts and mappings that should be used instead (test pending).