Fix bug hidden on CI and make ci failed if tests failure (#29254)

The tests on migration tests failed but CI reports successfully


https://github.com/go-gitea/gitea/actions/runs/7364373807/job/20044685969#step:8:141

This PR will fix the bug on migration v283 and also the CI hidden
behaviour.

The reason is on the Makefile

`GITEA_ROOT="$(CURDIR)" GITEA_CONF=tests/mysql.ini $(GO) test
$(GOTESTFLAGS) -tags='$(TEST_TAGS)' $(MIGRATE_TEST_PACKAGES)` will
return the error exit code.

But 

`for pkg in $(shell $(GO) list
code.gitea.io/gitea/models/migrations/...); do \
GITEA_ROOT="$(CURDIR)" GITEA_CONF=tests/mysql.ini $(GO) test
$(GOTESTFLAGS) -tags '$(TEST_TAGS)' $$pkg; \
	done`

will not work.

This also fix #29602

.github/workflows/pull-db-tests.yml

@@ -49,7 +49,10 @@ jobs:
       - run: make backend
         env:
           TAGS: bindata
-      - run: make test-pgsql-migration test-pgsql
+      - name: run migration tests
+        run: make test-pgsql-migration
+      - name: run tests
+        run: make test-pgsql
         timeout-minutes: 50
         env:
           TAGS: bindata gogit
@@ -72,7 +75,10 @@ jobs:
       - run: make backend
         env:
           TAGS: bindata gogit sqlite sqlite_unlock_notify
-      - run: make test-sqlite-migration test-sqlite
+      - name: run migration tests
+        run: make test-sqlite-migration
+      - name: run tests
+        run: make test-sqlite
         timeout-minutes: 50
         env:
           TAGS: bindata gogit sqlite sqlite_unlock_notify
@@ -175,8 +181,10 @@ jobs:
       - run: make backend
         env:
           TAGS: bindata
+      - name: run migration tests
+        run: make test-mysql-migration
       - name: run tests
-        run: make test-mysql-migration integration-test-coverage
+        run: make integration-test-coverage
         env:
           TAGS: bindata
           RACE_ENABLED: true
@@ -208,7 +216,9 @@ jobs:
       - run: make backend
         env:
           TAGS: bindata
-      - run: make test-mssql-migration test-mssql
+      - run: make test-mssql-migration
+      - name: run tests
+        run: make test-mssql
         timeout-minutes: 50
         env:
           TAGS: bindata