Try to fix dynamic instrumentation tests (#7415)

## Summary of changes

Try to fix dynamic instrumentation tests

## Reason for change

The debugger tests are broken in master because #7398 didn't trigger the
debugger tests to run

## Implementation details

Add the log message it expects

## Test coverage

Will trigger a dedicated test run to make sure we test the debugger

## Other details

We should probably update the `Instrumentation` file to be co-owned, to
make sure this kind of thing doesn't happen again
- #7416

Author: andrewlock

tracer/src/Datadog.Trace/ClrProfiler/Instrumentation.cs

@@ -463,6 +463,10 @@ private static void InitializeDebugger(TracerSettings tracerSettings)
                         }
                     });
             }
+            else
+            {
+                Log.Information($"Dynamic Instrumentation is disabled. To enable it, please set {ConfigurationKeys.Debugger.DynamicInstrumentationEnabled} environment variable to 'true'.");
+            }
         }
 
         // /!\ This method is called by reflection in the SampleHelpers