Agent context storage wrapper should not override other wrappers (#7355)

Resolves
#7344

Co-authored-by: Trask Stalnaker <trask.stalnaker@gmail.com>

instrumentation/opentelemetry-api/opentelemetry-api-1.0/javaagent/src/main/java/io/opentelemetry/javaagent/instrumentation/opentelemetryapi/ContextStorageWrappersInstrumentation.java

@@ -46,7 +46,8 @@ public static void methodExit(
         @Advice.Return(readOnly = false)
             List<Function<? super ContextStorage, ? extends ContextStorage>> wrappers) {
       wrappers = new ArrayList<>(wrappers);
-      wrappers.add(AgentContextStorage.wrap());
+      // AgentContextStorage wrapper doesn't delegate, so needs to be the innermost wrapper
+      wrappers.add(0, AgentContextStorage.wrap());
     }
   }
 }