Implement the PLDM.Event interface
Implement the PLDM.Event interface

This commit implements a DBus interface defined at
https://gerrit.openbmc-project.xyz/c/openbmc/phosphor-dbus-interfaces/+/33552

When the PLDM daemon receives a state sensor EventMessages, it emits the
PLDM.Event.StateSensorEvent signal (with TID, sensorID, sensorOffset,
eventState, previousEventState as the signal data).
https://gerrit.openbmc-project.xyz/c/openbmc/pldm/+/33553

Signed-off-by: Chicago Duan <59e578ba3aa6892261ad173cf164b253a479b4ed@inspur.com>
Change-Id: I64f4b08cf754ff4af74f8c6137ff8de41ccf89f7

openbmc/pldm,openbmc/pldm,openbmc/pldm