matter-devices.xml: Fix DEM (Simple -> Utility) (#36458)

* matter-devices.xml: Fix DEM (Simple -> Utility)

This change fixes the DEM device type description in matter-devices.xml.
The most relevant change is fixing the class type from Simple to
Utility.

This was generated using alchemy with the command:
```
alchemy/alchemy zap --attribute="in-progress"  --sdkRoot=./connectedhomeip/ --specRoot=./connectedhomeip-spec/ ./connectedhomeip-spec/src/device_types/DeviceEnergyManagement.adoc
```

* zap regen

* Fix name to avoid unwanted changes on Zap generation.

src/app/zap-templates/zcl/data-model/chip/matter-devices.xml

@@ -2681,11 +2681,11 @@ limitations under the License.
         <name>Device Energy Management</name>
         <domain>CHIP</domain>
         <typeName>Device Energy Management</typeName>
-        <class>Simple</class>
+        <class>Utility</class>
         <profileId editable="false">0x0103</profileId>
         <deviceId editable="false">0x050D</deviceId>
+        <scope>Endpoint</scope>
         <clusters lockOthers="true">
-            <include cluster="Descriptor" client="false" server="true" clientLocked="true" serverLocked="true"></include>
             <include cluster="Device Energy Management" client="false" server="true" clientLocked="true" serverLocked="true"></include>
             <include cluster="Device Energy Management Mode" client="false" server="true" clientLocked="true" serverLocked="false"></include>
         </clusters>