Actions: Disable the CLR tracer in C# autobuild test

Ensure that this succeeds even if the legacy CLR tracer is not enabled.
The combination of the regular tracer and the SIP workaround within Actions
should be sufficient for this to pass.

.github/workflows/__autobuild-action.yml

@@ -49,6 +49,14 @@ jobs:
         languages: csharp
         tools: ${{ steps.prepare-test.outputs.tools-url }}
     - uses: ./../action/autobuild
+      env:
+      # Explicitly disable the CLR tracer.
+        COR_ENABLE_PROFILING: ''
+        COR_PROFILER: ''
+        COR_PROFILER_PATH_64: ''
+        CORECLR_ENABLE_PROFILING: ''
+        CORECLR_PROFILER: ''
+        CORECLR_PROFILER_PATH_64: ''
     - uses: ./../action/analyze
       env:
         TEST_MODE: true