[yum tests] add missing "always" block (#71564)

Change:
- So that if yum tests get re-run, we don't error out the second time.

Signed-off-by: Rick Elrod <rick@elrod.me>

test/integration/targets/yum/tasks/yum.yml

@@ -869,3 +869,10 @@
           - remove is changed
           - "'toaster-1.2.3.4' not in rpmqa.stdout"
           - "'test-package-that-provides-toaster' in rpmqa.stdout"
+  always:
+    - name: Remove test packages
+      yum:
+        name:
+          - test-package-that-provides-toaster
+          - toaster
+        state: absent