download loki binaries on the target system

this has the downside of taking up a bit of space,
but at least this makes the role more idempotent when it comes
to re-running it from different control nodes (e.g. in CI)

tasks/install.yml

@@ -49,7 +49,6 @@
       retries: 5
       delay: 2
       loop: "{{ loki_bins }}"
-      delegate_to: localhost
       check_mode: false
 
     - name: unpack binaries
@@ -59,7 +58,6 @@
         dest: "/tmp"
         creates: "/tmp/{{ item }}-{{ loki_version }}-linux-{{ go_arch }}"
       loop: "{{ loki_bins }}"
-      delegate_to: localhost
       check_mode: false
 
     - name: propagate official binaries
@@ -69,6 +67,7 @@
         mode: 0755
         owner: root
         group: root
+        remote_src: true
       loop: "{{ loki_bins }}"
       notify:
         - restart loki