alloy(role): add documentation

- add README
- add argument_specs
- removed tags

roles/alloy/tasks/blackbox-exporter.yaml

@@ -1,6 +1,5 @@
 ---
 - name: Render blackbox exporter config
-  tags: [ blackbox-exporter, alloy ]
   become: true
   ansible.builtin.template:
     src: config.blackbox-exporter.j2

roles/alloy/tasks/install.yaml

@@ -5,7 +5,7 @@
     name: grafana
     types: deb
     uris: https://apt.grafana.com
-    suites: stable
+    suites: "{{ ansible_facts['distribution_release'] }}"
     components:
       - main
     signed_by: https://apt.grafana.com/gpg.key

roles/alloy/tasks/main.yaml

@@ -2,9 +2,8 @@
 - name: Deploy Grafana Alloy with config
   tags: [ alloy ]
   block:
-    - name: Install Alloy on Debian
-      when: ansible_facts['distribution'] == "Debian"
-      ansible.builtin.include_tasks: install_debian.yml
+    - name: Install Alloy
+      ansible.builtin.include_tasks: install.yaml
 
     - name: Create systemd override for alloy
       become: true

roles/alloy/tasks/unpoller.yaml

@@ -1,6 +1,5 @@
 ---
 - name: Install and Setup unpoller
-  tags: [ unpoller, alloy, podman, container ]
   block:
     - name: Install Podman
       become: true