Use new CI templates

.gitlab-ci.yml

-include: "https://git.autistici.org/ai3/build-deb/raw/master/ci-common.yml"
-
-run_tests:
-  stage: test
-  image: "registry.git.autistici.org/ai3/docker/test/golang:master"
-  script:
-    - run-go-test ./...
-  artifacts:
-    when: always
-    reports:
-      junit: report.xml
-      coverage_report:
-        coverage_format: cobertura
-        path: cover.xml
+include:
+  - "https://git.autistici.org/pipelines/debian/raw/master/common.yml"
+  - "https://git.autistici.org/pipelines/images/test/golang/raw/master/ci.yml"