Add missing enum cases in ExecuTorchError.h (#12721)

(cherry picked from commit f476ea1)

Author: shoumikhin

extension/apple/ExecuTorch/Exported/ExecuTorchError.h

@@ -19,30 +19,34 @@ FOUNDATION_EXPORT NSErrorDomain const ExecuTorchErrorDomain NS_SWIFT_NAME(ErrorD
  */
 typedef NS_ERROR_ENUM(ExecuTorchErrorDomain, ExecuTorchErrorCode) {
   // System errors.
-  ExecuTorchErrorCodeOk                             = 0,
-  ExecuTorchErrorCodeInternal                       = 1,
-  ExecuTorchErrorCodeInvalidState                   = 2,
-  ExecuTorchErrorCodeEndOfMethod                    = 3,
+  ExecuTorchErrorCodeOk                              = 0,
+  ExecuTorchErrorCodeInternal                        = 1,
+  ExecuTorchErrorCodeInvalidState                    = 2,
+  ExecuTorchErrorCodeEndOfMethod                     = 3,
 
   // Logical errors.
-  ExecuTorchErrorCodeNotSupported                   = 16,
-  ExecuTorchErrorCodeNotImplemented                 = 17,
-  ExecuTorchErrorCodeInvalidArgument                = 18,
-  ExecuTorchErrorCodeInvalidType                    = 19,
-  ExecuTorchErrorCodeOperatorMissing                = 20,
+  ExecuTorchErrorCodeNotSupported                    = 16,
+  ExecuTorchErrorCodeNotImplemented                  = 17,
+  ExecuTorchErrorCodeInvalidArgument                 = 18,
+  ExecuTorchErrorCodeInvalidType                     = 19,
+  ExecuTorchErrorCodeOperatorMissing                 = 20,
+
+  // Registration errors.
+  ExecuTorchErrorCodeRegistrationExceedingMaxKernels = 21,
+  ExecuTorchErrorCodeRegistrationAlreadyRegistered   = 22,
 
   // Resource errors.
-  ExecuTorchErrorCodeNotFound                       = 32,
-  ExecuTorchErrorCodeMemoryAllocationFailed         = 33,
-  ExecuTorchErrorCodeAccessFailed                   = 34,
-  ExecuTorchErrorCodeInvalidProgram                 = 35,
-  ExecuTorchErrorCodeInvalidExternalData            = 36,
-  ExecuTorchErrorCodeOutOfResources                 = 37,
+  ExecuTorchErrorCodeNotFound                        = 32,
+  ExecuTorchErrorCodeMemoryAllocationFailed          = 33,
+  ExecuTorchErrorCodeAccessFailed                    = 34,
+  ExecuTorchErrorCodeInvalidProgram                  = 35,
+  ExecuTorchErrorCodeInvalidExternalData             = 36,
+  ExecuTorchErrorCodeOutOfResources                  = 37,
 
   // Delegate errors.
-  ExecuTorchErrorCodeDelegateInvalidCompatibility   = 48,
-  ExecuTorchErrorCodeDelegateMemoryAllocationFailed = 49,
-  ExecuTorchErrorCodeDelegateInvalidHandle          = 50,
+  ExecuTorchErrorCodeDelegateInvalidCompatibility    = 48,
+  ExecuTorchErrorCodeDelegateMemoryAllocationFailed  = 49,
+  ExecuTorchErrorCodeDelegateInvalidHandle           = 50,
 } NS_SWIFT_NAME(ErrorCode);
 
 /**

extension/apple/ExecuTorch/Exported/ExecuTorchError.m

@@ -30,6 +30,10 @@
       return @"Invalid type";
     case ExecuTorchErrorCodeOperatorMissing:
       return @"Operator missing";
+    case ExecuTorchErrorCodeRegistrationExceedingMaxKernels:
+      return @"Exceeded maximum number of kernels";
+    case ExecuTorchErrorCodeRegistrationAlreadyRegistered:
+      return @"Kernel is already registered";
     case ExecuTorchErrorCodeNotFound:
       return @"Resource not found";
     case ExecuTorchErrorCodeMemoryAllocationFailed: