Add async_method_call to utility

Adding async_method_call in dbus utility gives us a place where we can
intercept method call requests from dbus to potentially add
logging/caching.

An example of logging is in the later commit:
https://gerrit.openbmc.org/c/openbmc/bmcweb/+/78265/

We already do this for setProperty, this moves the method calls to
follow a similar pattern.

Tested: Redfish service validator passes.

Change-Id: I6d2c96e2b6b6a023ed2138106a55faebca161592
Signed-off-by: Ed Tanous <etanous@nvidia.com>
diff --git a/redfish-core/lib/update_service.hpp b/redfish-core/lib/update_service.hpp
index 44c8777d..1e28dda5 100644
--- a/redfish-core/lib/update_service.hpp
+++ b/redfish-core/lib/update_service.hpp
@@ -844,7 +844,8 @@
     const MemoryFileDescriptor& memfd, const std::string& applyTime,
     const std::string& objectPath, const std::string& serviceName)
 {
-    crow::connections::systemBus->async_method_call(
+    dbus::utility::async_method_call(
+        asyncResp,
         [asyncResp, payload = std::move(payload),
          objectPath](const boost::system::error_code& ec1,
                      const sdbusplus::message::object_path& retPath) mutable {