DNM Add compressed version of all collected logs

In the post job, there would be create a tar.gz. file that contains
all collected logs.
It might be helpful to download whole logs in faster way than
iterating on each files.

ci/playbooks/collect-logs.yml

@@ -136,6 +136,12 @@
             src: "{{ ansible_user_dir }}/{{ zuul.project.src_dir }}/docs_build"
             dest: "{{ ansible_user_dir }}/zuul-output/logs/docs_build"
 
+        - name: Create tar gz file
+          ansible.builtin.command: |
+            tar -caf {{ ansible_user_dir }}/all-logs.zst {{ ansible_user_dir }}/zuul-output/
+            mv {{ ansible_user_dir }}/all-logs.zst  {{ ansible_user_dir }}/zuul-output/
+            chown "{{ ansible_user }}" {{ ansible_user_dir }}/zuul-output/all-logs.zst
+
       always:
         - name: Copy files from workspace on node
           vars: