Add download localhost and enable for CI

* Add download_localhost for the download_run_once mode, which is
  use the ansible host (a travis node for CI case) to store and
  distribute containers across cluster nodes in inventory.
  Defaults to false.
* Rework download_run_once logic to fix idempotency of uploading
  containers.
* For Travis CI, enable docker images caching and run Travis
  workers with sudo enabled as a dependency
* For Travis CI, deploy with download_localhost and download_run_once
  enabled to shourten dev path drastically.
* Add compression for saved container images. Defaults to 'best'.

Signed-off-by: Bogdan Dobrelya <bdobrelia@mirantis.com>
Co-authored-by: Aleksandr Didenko <adidenko@mirantis.com>

tests/cloud_playbooks/upload-logs-gcs.yml

@@ -8,12 +8,12 @@
 
   tasks:
     - name: Generate uniq bucket name prefix
-      shell: date +%Y%m%d
+      raw: date +%Y%m%d
       register: out
 
     - name: replace_test_id
       set_fact:
-        test_name: "kargo-ci-{{ out.stdout }}"
+        test_name: "kargo-ci-{{ out.stdout_lines[0] }}"
 
     - set_fact:
         file_name: "{{ostype}}-{{kube_network_plugin}}-{{commit}}-logs.tar.gz"