fix: avoid using shell for fetching latest version (#55)

Signed-off-by: gardar <gardar@users.noreply.github.com>

roles/grafana_agent/tasks/preflight/download.yaml

@@ -1,25 +1,13 @@
 ---
-- name: Get Grafana Agent version from Github
+- name: Set the Grafana Agent version to latest version
+  ansible.builtin.set_fact:
+    grafana_agent_version: "{{ (lookup('url', 'https://api.github.com/repos/{{ _grafana_agent_github_org }}/{{ _grafana_agent_github_repo }}/releases/latest',
+                             split_lines=False) | from_json).get('tag_name') | replace('v', '') }}"
   when: grafana_agent_version == 'latest' and not __grafana_agent_local_install
-  block:
-    - name: Get the latest published Grafana Agent     # noqa command-instead-of-module
-      ansible.builtin.shell: |
-        curl -s https://api.github.com/repos/{{ _grafana_agent_github_org }}/{{ _grafana_agent_github_repo }}/releases/latest \
-          | grep -m 1 tag_name \
-          | cut -d '"' -f 4 | cut -c 2-
-      changed_when: false
-      run_once: true
-      delegate_to: localhost
-      become: false
-      register: _grafana_agent_version_request
 
-    - name: Set the Grafana Agent version
+- name: Grafana Agent version to download
-      ansible.builtin.set_fact:
+  ansible.builtin.debug:
-        grafana_agent_version: "{{ _grafana_agent_version_request.stdout }}"
+    var: grafana_agent_version
-
-    - name: Grafana Agent version to download
-      ansible.builtin.debug:
-        var: grafana_agent_version
 
 - name: Set the Grafana Agent download URL
   ansible.builtin.set_fact: