Fix flaky wizard screenshot test failure, and try to make screenshot tests run more consistently (#80631)

From https://github.com/tgstation/tgstation/pull/80542

Not exactly sure why this only fails once. My hint is that it happens
when the alternate tests are skipped from this:


![image](https://github.com/tgstation/tgstation/assets/35135081/67c261c0-e771-4696-add2-f41bb800ad65)

...though this should still be *consistent* at least.

.github/workflows/ci_suite.yml

@@ -215,7 +215,7 @@ jobs:
       - run: echo Alternate tests passed.
 
   compare_screenshots:
-    if: ( !contains(github.event.head_commit.message, '[ci skip]') && (success() || failure()) )
+    if: ( !contains(github.event.head_commit.message, '[ci skip]') && (always() && (!failure() && !cancelled())) )
     needs: [run_all_tests, run_alternate_tests]
     name: Compare Screenshot Tests
     runs-on: ubuntu-22.04