Merge remote-tracking branch 'dev/13-5-stable' into 13-5-stable

ci_files/variables.yml

 ---
 variables:
   GITLAB_ELASTICSEARCH_INDEXER_VERSION: v2.7.0
-  GITLAB_VERSION: v13.5.6-ee
-  GITLAB_REF_SLUG: v13.5.6-ee
-  GITLAB_ASSETS_TAG: v13.5.6-ee
+  GITLAB_VERSION: v13.5.7-ee
+  GITLAB_REF_SLUG: v13.5.7-ee
+  GITLAB_ASSETS_TAG: v13.5.7-ee
   GITLAB_EXPORTER_VERSION: 7.0.6
   GITLAB_SHELL_VERSION: v13.11.0
   GITLAB_WORKHORSE_VERSION: v8.51.2
   GITLAB_CONTAINER_REGISTRY_VERSION: v2.11.0-gitlab
-  GITALY_SERVER_VERSION: v13.5.6
+  GITALY_SERVER_VERSION: v13.5.7
   GIT_VERSION: 2.28.0
   GO_VERSION: 1.14.5
   KUBECTL_VERSION: 1.14.10