Fix checkoutv2 push trigger on dev (#2263)

* push trigger on dev

.github/workflows/ci_ut.yml

@@ -15,7 +15,11 @@
 # limitations under the License.
 #
 
-on: ["pull_request", "push"]
+on:
+  pull_request:
+  push:
+    branches:
+      - dev
 env:
   DOCKER_DIR: ./docker
   LOG_DIR: /tmp/dolphinscheduler
@@ -58,7 +62,6 @@ jobs:
           export MAVEN_OPTS='-Dmaven.repo.local=.m2/repository -XX:+TieredCompilation -XX:TieredStopAtLevel=1 -XX:+CMSClassUnloadingEnabled -XX:+UseConcMarkSweepGC -XX:-UseGCOverheadLimit -Xmx3g'
           mvn test -B -Dmaven.test.skip=false
       - name: Upload coverage report to codecov
-        if: github.event_name == 'pull_request'
         run: |
           CODECOV_TOKEN="09c2663f-b091-4258-8a47-c981827eb29a" bash <(curl -s https://codecov.io/bash)
       - name: Run SonarCloud Analysis