github: use canonical/setup-lxd action to setup LXD

Signed-off-by: Simon Deziel <simon.deziel@canonical.com>

.github/workflows/tests.yml

@@ -49,18 +49,12 @@ jobs:
       with:
         python-version: ${{ matrix.python-version }}
 
+    - name: Setup LXD
+      uses: canonical/setup-lxd
+
     - name: Install dependencies
       run: |
         set -x
-
-        sudo apt-get autopurge moby-containerd docker uidmap -y
-        sudo ip link delete docker0
-        sudo nft flush ruleset
-
-        sudo snap refresh lxd
-        sudo adduser "$USER" lxd
-        sudo lxd init --auto
-
         pip install --upgrade pip tox codecov
 
     - name: Coverage
@@ -70,7 +64,7 @@ jobs:
 
     - name: Integration
       run: |
-        sudo -g lxd integration/run-integration-tests
+        integration/run-integration-tests
 
   publish:
     name: Publish