Wherever we use `issue_type`, we need to start using the `work_item_type`. This will hit queries, permission checks, etc. After we have removed all usage of the column and the [issue_type_uses_work_item_types_table](https://gitlab.com/gitlab-org/gitlab/-/issues/386603) feature flag, we should remove the column from the DB as described in https://gitlab.com/gitlab-org/gitlab/-/issues/402699 ### Availability and Testing Regression testing, please make sure `e2e:package-and-test` job is passing. Ensure updated test coverage in unit/integration/feature tests.