Support persist_docs feature #155
Description
Persist docs (see: https://docs.getdbt.com/reference/resource-configs/persist_docs) allows the model and column descriptions tracked in the yaml to be persisted in the database as table and column comments/descriptions. Vertica supports comments on objects (see: https://docs.vertica.com/24.3.x/en/sql-reference/statements/comment-on-statements/comment-on-column/)
Currently, enable persist_docs causes an error:
ERROR: alter_relation_comment macro not implemented for adapter vertica
So, support for the alter_relation_comment macro is needed in order to have this valuable functionality.