Deploy osmo-ci to ogt nodes and update it periodically

We need osmo-ci in those nodes in order for the docker old images to be
cleaned through cron entry installed by ansible docker role, which uses
/home/jenkins/osmo-ci/scripts/docker-cleanup.sh.

Related: OS#5441
Change-Id: Ieb6db0b24dce6099cfa24871a957471ca2c8bcee

ansible/setup-gsm-tester.yml

@@ -14,6 +14,12 @@
           - curl
         cache_valid_time: 3600
         update_cache: yes
+    - name: deploy osmo-ci to home directory
+      become: yes
+      become_user: "jenkins"
+      git:
+        repo: "https://git.osmocom.org/osmo-ci"
+        dest: "/home/jenkins/osmo-ci"
   roles:
     - name: gsm-tester
       tags:

jobs/update-osmo-ci-on-slaves.yml

@@ -16,6 +16,8 @@
             - gtp0-deb9build
             - gtp0-deb10build32
             - gtp0-deb10fr
+            - osmo-gsm-tester-prod
+            - osmo-gsm-tester-rnd
     properties:
       - build-discarder:
           days-to-keep: 30