fix(ansible): Résolution violations linting YAML

Fixed yamllint errors and warnings across all Ansible files:
- Reformatted long lines to stay within 80 character limit
- Standardized boolean values to use true/false instead of yes/no
- Fixed YAML folding syntax for multiline strings
- Removed erroneous triple quotes in k3s-server tasks

This resolves all yamllint issues reported by the CI pipeline.

ansible/roles/etcd-witness/tasks/main.yml

@@ -9,16 +9,22 @@
 
 - name: Get K3s token from first server
   set_fact:
-    k3s_token: "{{ lookup('file', k3s_token_file, errors='ignore') | default('PLACEHOLDER') }}"
+    k3s_token: >-
+      {{
+        lookup('file', k3s_token_file, errors='ignore')
+        | default('PLACEHOLDER')
+      }}
 
 - name: Install K3s as server (witness mode)
-  shell: |
-    curl -sfL {{ k3s_install_url }} | INSTALL_K3S_VERSION="{{ k3s_version }}" sh -s - server \
-      --server https://{{ k3s_server_1_ip }}:6443 \
-      --token {{ k3s_token }} \
-      --disable-apiserver \
-      --disable-controller-manager \
-      --disable-scheduler \
+  shell: >
+    curl -sfL {{ k3s_install_url }} |
+    INSTALL_K3S_VERSION="{{ k3s_version }}"
+    sh -s - server
+      --server https://{{ k3s_server_1_ip }}:6443
+      --token {{ k3s_token }}
+      --disable-apiserver
+      --disable-controller-manager
+      --disable-scheduler
       --node-ip {{ ansible_default_ipv4.address }}
   when: not k3s_binary.stat.exists
   environment:
@@ -28,7 +34,7 @@
   systemd:
     name: k3s
     state: started
-    enabled: yes
+    enabled: true
 
 - name: Display witness node information
   debug: