now installs pulumi on macos using brew

tasks/pkgs/pulumi.yml

@@ -4,14 +4,22 @@
   when:
     - pulumi_configured is undefined
   block:
+    - name: Set pulumi_configured
+      ansible.builtin.set_fact:
+        pulumi_configured: true
+
     - name: Load pulumi config
       ansible.builtin.include_tasks:
         file: config/pulumi.yml
 
-    - name: Append pulumit to pkg_archive
+    - name: Append pulumi to pkg_archive
+      when:
+        - ansible_system == 'Linux'
       ansible.builtin.set_fact:
         pkg_archive: "{{ pkg_archive + ['pulumi'] }}"
 
-    - name: Set pulumi_configured
+    - name: Append to pulumi to pkg_sys
+      when:
+        - ansible_system == 'Darwin'
       ansible.builtin.set_fact:
-        pulumi_configured: true
+        pkg_sys: "{{ pkg_sys + ['pulumi'] }}"