schemas/util.sql: diff(): support custom = operator for the table type (to FULL JOIN on only some columns). this requires casting to the base type, to avoid an ambiguity with the default = operator for record.

schemas/util.sql: remake_diff_table(): use util.quote_typed() instead of hardcoding the type

fix: inputs/SALVIAS/validations.sql: _plots_02_list_of_project_names: altered column aliases to match output query

fix: inputs/SALVIAS/validations.sql: _plots_02_list_of_project_names: altered column aliases to match output query

fix: schemas/vegbien.sql: rm_query_group(): schemas/vegbien.sql: util.drop_relations_like(): also need to drop ~type tables, so that they will be re-created for the new queries of that group

schemas/vegbien.sql: added rm_query_group(), which removes all validations queries with a particular group prefix

schemas/vegbien.sql: generated ~type for _plots_04_count_of_plots_in_each_project_in_this_source

schemas/util.sql: added drop_relations_like()

fix: schemas/vegbien.sql: public_validations._plots_* that use projectname: re-alias to project_name to match input queries. (reexporting apparently changes the relative order of the ~type tables.)

fix: schemas/vegbien.sql: _plots_03_count_of_all_plots_in_this_source: use top_plot instead of location because the corresponding input query includes just the top-level plots