Merge branch 'workhorse/ci-go17' into 'master'

ci: Start integrating go 1.17 into workhorse CI pipeline

See merge request gitlab-org/gitlab!69146

.gitlab/ci/workhorse.gitlab-ci.yml

@@ -30,3 +30,7 @@ workhorse:test using go 1.15:
 workhorse:test using go 1.16:
   extends: .workhorse:test
   image: ${GITLAB_DEPENDENCY_PROXY}golang:1.16
+
+workhorse:test using go 1.17:
+  extends: .workhorse:test
+  image: ${GITLAB_DEPENDENCY_PROXY}golang:1.17