Misc unrelated code cleanup from #45000, split into a different PR. (#45001)

modules/drivers/mongo/test/metabase/driver/mongo_test.clj

src/metabase/models/permissions.clj

src/metabase/query_processor/middleware/permissions.clj

src/metabase/server/middleware/session.clj

test/metabase/models/on_demand_test.clj

...ase/query_processor/middleware/parameters/native_test.clj

test/metabase/query_processor_test/parameters_test.clj

test/metabase/test/data/users.clj