schemas/Makefile: vegbien.sql: support auxiliary schemas besides *_validation

fix: schemas/Makefile: %/publish: removed no longer applicable instructions about running `make schemas/rotate`. you should not publish a schema until you are satisfied that it can replace the previous public schema, so that the previous public schema doesn't need to be saved.

fix: schemas/vegbien.sql: public_validation comment: undid incorrect replacement of "validation" with "public_validation"

bugfix: schemas/Makefile: "public": dont

schemas/Makefile: %/publish: don't ignore errors if schema doesn't exist, because it should always exist if you are publishing it

schemas/Makefile: `%/uninstall: vegbien.sql`: use util.schema_bundle_rm() instead of public.rm(), because when the public schema is incompletely imported, public.rm() will not yet exist

schemas/Makefile: `%/install: vegbien.sql`: support auxiliary schemas besides *_validation

schemas/Makefile: %/uninstall, %/publish: use new public.rm(), publish(), which encapsulate the process of renaming multiple related schemas and also allow additional auxiliary schemas beyond just *_validation

schemas/vegbien.sql: added rm(), which deletes this schema

schemas/vegbien.sql: added publish(), which publishes this schema