guestfs: Fix the use of libvirt_uri

When using community.libvirt.virt, the libvirt URI is passed in as a
module parameter. When invoking the "virsh" command, the URI has to
be set via an environment variable, which I forgot to do when
converting the guestfs bringup shell scripts to an Ansible playbook.

Fixes: 45548d2 ("guestfs: Convert scripts/bringup_guestfs.sh to Ansible")
Fixes: 9831f59 ("guestfs: Copy "network" tag steps to guestfs role")
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>

Author: chucklever

playbooks/roles/guestfs/tasks/bringup/main.yml

@@ -112,6 +112,8 @@
       register: passthrough_devices
 
     - name: Attach PCIe passthrough devices to each target node
+      environment:
+        LIBVIRT_DEFAULT_URI: "{{ libvirt_uri }}"
       ansible.builtin.command:
         argv:
           - "virsh"

playbooks/roles/guestfs/tasks/bringup/network.yml

@@ -64,6 +64,8 @@
   become: true
   become_flags: 'su - -c'
   become_method: ansible.builtin.sudo
+  environment:
+    LIBVIRT_DEFAULT_URI: "{{ libvirt_uri }}"
   ansible.builtin.shell: virsh net-list | grep -q default
   register: libvirt_default_net
   ignore_errors: true
@@ -75,6 +77,8 @@
   become: true
   become_flags: 'su - -c'
   become_method: ansible.builtin.sudo
+  environment:
+    LIBVIRT_DEFAULT_URI: "{{ libvirt_uri }}"
   ansible.builtin.command:
     cmd: "virsh net-start default"
   changed_when: true