chore: enable messenger test

Author: cedricziel

src/Instrumentation/Symfony/phpunit.xml.dist

@@ -33,6 +33,8 @@
         <ini name="display_errors" value="On" />
         <ini name="display_startup_errors" value="On" />
         <ini name="error_reporting" value="E_ALL" />
+
+        <env name="OTEL_PHP_MESSENGER_INSTRUMENT_MIDDLEWARES" value="true" />
     </php>
 
     <testsuites>