Switch to lg2 for logging

After enabling C++20, lg2 is preferred for logging. This patch replaces
all phosphor::logging::log calls to lg2 calls.

Tested:
Build pass.

Change-Id: Ic37bc36f43c2b3a1c61b1328af95e3a41c8d6d40
Signed-off-by: Jiaqing Zhao <jiaqing.zhao@intel.com>
diff --git a/phosphor-ldap-config/ldap_config_mgr.hpp b/phosphor-ldap-config/ldap_config_mgr.hpp
index 850fc54..3b48127 100644
--- a/phosphor-ldap-config/ldap_config_mgr.hpp
+++ b/phosphor-ldap-config/ldap_config_mgr.hpp
@@ -6,7 +6,7 @@
 
 #include <phosphor-logging/elog-errors.hpp>
 #include <phosphor-logging/elog.hpp>
-#include <phosphor-logging/log.hpp>
+#include <phosphor-logging/lg2.hpp>
 #include <sdbusplus/bus.hpp>
 #include <xyz/openbmc_project/Common/error.hpp>
 #include <xyz/openbmc_project/User/Ldap/Config/server.hpp>