gitlab-ci: add smoke test for fuzzers

Our GitLab CI setup has a test gap where the fuzzers aren't exercised at
all. Add a smoke test, similar to the one we have in GitHub Workflows.

Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

.gitlab-ci.yml

@@ -93,6 +93,15 @@ test:osx:
       - t/failed-test-artifacts
     when: on_failure
 
+test:fuzz-smoke-tests:
+  image: ubuntu:latest
+  variables:
+    CC: clang
+  before_script:
+    - ./ci/install-docker-dependencies.sh
+  script:
+    - ./ci/run-build-and-minimal-fuzzers.sh
+
 static-analysis:
   image: ubuntu:22.04
   variables: