Align Group Key Management cluster XML to spec changes. (#25202)

* Align Group Key Management cluster XML to spec changes.

Spec changes happened in https://github.com/CHIP-Specifications/connectedhomeip-spec/pull/6260.

Fixes https://github.com/project-chip/connectedhomeip/issues/25182

* Regenerate generated files.
diff --git a/examples/chef/devices/rootnode_fan_7N2TobIlOX.matter b/examples/chef/devices/rootnode_fan_7N2TobIlOX.matter
index f25e30b..7615fee 100644
--- a/examples/chef/devices/rootnode_fan_7N2TobIlOX.matter
+++ b/examples/chef/devices/rootnode_fan_7N2TobIlOX.matter
@@ -1012,7 +1012,7 @@
 }
 
 server cluster GroupKeyManagement = 63 {
-  enum GroupKeySecurityPolicy : ENUM8 {
+  enum GroupKeySecurityPolicyEnum : ENUM8 {
     kTrustFirst = 0;
     kCacheAndSync = 1;
   }
@@ -1032,7 +1032,7 @@
 
   struct GroupKeySetStruct {
     int16u groupKeySetID = 0;
-    GroupKeySecurityPolicy groupKeySecurityPolicy = 1;
+    GroupKeySecurityPolicyEnum groupKeySecurityPolicy = 1;
     nullable octet_string<16> epochKey0 = 2;
     nullable epoch_us epochStartTime0 = 3;
     nullable octet_string<16> epochKey1 = 4;