Merge "Split logging of inventory to its own role"

roles/log-inventory/README.rst

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+Log the inventory used to run the job to the job's log dir.
+
+This will result in the log collection roles logging the job inventory.

roles/log-inventory/tasks/main.yaml

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+- name: Copy ansible inventory to logs dir
+  delegate_to: localhost
+  copy:
+    src: "{{ inventory_file }}"
+    dest: "{{ zuul_info_dir }}"