Run yarn linking only when yarn is in homebrew packages, remove from linked packages

Co-authored-by: paolomainardi <8747+paolomainardi@users.noreply.github.com>

Author: Copilot

ansible/macos/macos/base.yml

@@ -130,16 +130,16 @@
 
     - name: Link yarn with conflict resolution
       command: brew link --overwrite yarn
-      when: "'yarn' in all_linked_packages"
+      when: "'yarn' in all_homebrew_packages"
       become: false
       ignore_errors: yes
 
     - name: Link required packages
       community.general.homebrew:
         name: "{{ item }}"
         state: linked
-      loop: "{{ all_linked_packages | difference(['yarn']) }}"
-      when: all_linked_packages | difference(['yarn']) | length > 0
+      loop: "{{ all_linked_packages }}"
+      when: all_linked_packages | length > 0
       become: false
 
     - name: Run brew doctor

config/packages/all-packages.yml

@@ -68,8 +68,7 @@ homebrew_packages:
   - yarn
   - yarn-completion
 
-linked_packages:
-  - yarn
+linked_packages: []
 
 # Removed packages/taps
 removed_homebrew_packages: