Bump test workflow to 40 jobs to cover all 5 nodes

Author: Mark Saroufim

.github/workflows/test-arc-gpu-isolation.yml

@@ -9,7 +9,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        job_id: [1, 2, 3, 4, 5, 6, 7, 8]
+        job_id: [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40]
     timeout-minutes: 5
     steps:
       - name: Report resources