DO NOT COMMIT: restrict test invocation to abort_source

Temporary throttle so CI iteration on this branch finishes in a few
minutes rather than the full ~30. The Test step now passes only
'--name abort_source' to test.py, skipping inputs.test-args. Drop
this commit before merging.

Author: travisdowns

.github/workflows/test.yaml

@@ -95,4 +95,5 @@ jobs:
 
       - name: Test
         if: ${{ ! contains(inputs.enables, 'cxx-modules') }}
-        run: ./test.py --mode=${{ inputs.mode }} ${{ inputs.test-args }}
+        # DO NOT COMMIT: temporarily restricted to abort_source for fast CI iteration
+        run: ./test.py --mode=${{ inputs.mode }} --name abort_source