Merge EE migrations -> CE; convert FKs to ON DELETE CASCADE (#12946)

resources/migrations/000_migrations.yaml

src/metabase/models/alert.clj

src/metabase/models/card.clj

src/metabase/models/collection.clj

src/metabase/models/dashboard.clj

src/metabase/models/dashboard_card.clj

src/metabase/models/dashboard_card_series.clj

src/metabase/models/database.clj

src/metabase/models/field.clj

src/metabase/models/humanization.clj

src/metabase/models/metric.clj

src/metabase/models/permissions.clj

src/metabase/models/permissions_group.clj

src/metabase/models/permissions_revision.clj

src/metabase/models/pulse.clj

src/metabase/models/pulse_channel.clj

src/metabase/models/table.clj

src/metabase/models/user.clj

test/metabase/models/collection_test.clj