common.xml: deprecate MAV_CMD_SET_PARAMETER (#2099)

* common.xml: deprecate MAV_CMD_SET_PARAMETER

I don't think anybody actually implements this.
ArduPilot doesn't.
PX4 doesn't seem to.
QGC doesn't seem to
MissionPlanner doesn't.
MAVProxy doesn't

* Update message_definitions/v1.0/common.xml

---------

Co-authored-by: Hamish Willee <hamishwillee@gmail.com>

message_definitions/v1.0/common.xml

@@ -1441,6 +1441,7 @@
         <param index="7" label="Altitude" units="m">Altitude</param>
       </entry>
       <entry value="180" name="MAV_CMD_DO_SET_PARAMETER" hasLocation="false" isDestination="false">
+        <deprecated since="2024-04" replaced_by="PARAM_SET"/>
         <description>Set a system parameter.  Caution!  Use of this command requires knowledge of the numeric enumeration value of the parameter.</description>
         <param index="1" label="Number" minValue="0" increment="1">Parameter number</param>
         <param index="2" label="Value">Parameter value</param>