Switch CI to self-hosted runners

Author: Simon Morley

.github/workflows/test.yml

@@ -8,7 +8,7 @@ on:
 
 jobs:
   test:
-    runs-on: ubuntu-latest
+    runs-on: [self-hosted, linux, x64, nullrabbit]
     steps:
       - uses: actions/checkout@v4
       - uses: actions/setup-python@v5