Align naming in Operational Credentials cluster with the spec. (#24472)

* Align naming in Operational Credentials cluster with the spec.

* Regenerate generated files.
diff --git a/examples/lighting-app/lighting-common/lighting-app.matter b/examples/lighting-app/lighting-common/lighting-app.matter
index 623877d..2269e90 100644
--- a/examples/lighting-app/lighting-common/lighting-app.matter
+++ b/examples/lighting-app/lighting-common/lighting-app.matter
@@ -1250,8 +1250,13 @@
 }
 
 server cluster OperationalCredentials = 62 {
-  enum OperationalCertStatus : ENUM8 {
-    kSuccess = 0;
+  enum CertificateChainTypeEnum : ENUM8 {
+    kDACCertificate = 1;
+    kPAICertificate = 2;
+  }
+
+  enum NodeOperationalCertStatusEnum : ENUM8 {
+    kOk = 0;
     kInvalidPublicKey = 1;
     kInvalidNodeOpId = 2;
     kInvalidNOC = 3;
@@ -1269,17 +1274,17 @@
     fabric_idx fabricIndex = 254;
   }
 
-  fabric_scoped struct FabricDescriptor {
+  fabric_scoped struct FabricDescriptorStruct {
     octet_string<65> rootPublicKey = 1;
-    vendor_id vendorId = 2;
-    fabric_id fabricId = 3;
-    node_id nodeId = 4;
+    vendor_id vendorID = 2;
+    fabric_id fabricID = 3;
+    node_id nodeID = 4;
     char_string<32> label = 5;
     fabric_idx fabricIndex = 254;
   }
 
   readonly attribute access(read: administer) NOCStruct NOCs[] = 0;
-  readonly attribute FabricDescriptor fabrics[] = 1;
+  readonly attribute FabricDescriptorStruct fabrics[] = 1;
   readonly attribute int8u supportedFabrics = 2;
   readonly attribute int8u commissionedFabrics = 3;
   readonly attribute OCTET_STRING trustedRootCertificates[] = 4;
@@ -1292,7 +1297,7 @@
   }
 
   request struct CertificateChainRequestRequest {
-    INT8U certificateType = 0;
+    CertificateChainTypeEnum certificateType = 0;
   }
 
   request struct CSRRequestRequest {
@@ -1322,12 +1327,12 @@
   }
 
   request struct AddTrustedRootCertificateRequest {
-    OCTET_STRING rootCertificate = 0;
+    OCTET_STRING rootCACertificate = 0;
   }
 
   response struct AttestationResponse = 1 {
     OCTET_STRING attestationElements = 0;
-    OCTET_STRING signature = 1;
+    OCTET_STRING attestationSignature = 1;
   }
 
   response struct CertificateChainResponse = 3 {
@@ -1340,7 +1345,7 @@
   }
 
   response struct NOCResponse = 8 {
-    OperationalCertStatus statusCode = 0;
+    NodeOperationalCertStatusEnum statusCode = 0;
     optional fabric_idx fabricIndex = 1;
     optional CHAR_STRING debugText = 2;
   }