Remove `u/key-by` (#24131)

...box/query_processor/middleware/row_level_restrictions.clj

src/metabase/api/card.clj

src/metabase/api/persist.clj

src/metabase/api/search.clj

src/metabase/api/table.clj

src/metabase/models/field.clj

src/metabase/models/params.clj

.../query_processor/middleware/add_dimension_projections.clj

src/metabase/query_processor/middleware/annotate.clj

src/metabase/query_processor/middleware/expand_macros.clj

...ase/query_processor/middleware/upgrade_field_literals.clj

src/metabase/query_processor/util.clj

src/metabase/sync/sync_metadata/fields/sync_instances.clj

src/metabase/task/persist_refresh.clj

src/metabase/util.clj

test/metabase/api/permissions_test.clj

.../query_processor/middleware/add_implicit_clauses_test.clj

...se/query_processor/middleware/add_implicit_joins_test.clj

...e/query_processor/middleware/add_source_metadata_test.clj

test/metabase/query_processor/middleware/annotate_test.clj