ci: recursive checkout in coverity action

Fixes tarantool/tarantool-qa#281

NO_DOC=ci
NO_TEST=ci
NO_CHANGELOG=ci

.github/workflows/coverity.yml

@@ -20,6 +20,9 @@ jobs:
 
     steps:
       - uses: actions/checkout@v3
+        with:
+          fetch-depth: 0
+          submodules: recursive
       - uses: ./.github/actions/environment
       - name: test
         run: make -f .test.mk test-coverity