Do not recreate arsenal errors in happy paths

This is, especially on the PUT case, consuming CPU for no reason.

Issue: CLDSRV-742

Author: Seragonia

lib/api/apiUtils/object/objectRestore.js

@@ -1,5 +1,5 @@
 const async = require('async');
-const { errors, s3middleware } = require('arsenal');
+const { errors, errorInstances, s3middleware } = require('arsenal');
 
 const { allowedRestoreObjectRequestTierValues } = require('../../../../constants');
 const coldStorage = require('./coldStorage');
@@ -87,9 +87,9 @@ function objectRestore(metadata, mdUtils, userInfo, request, log, callback) {
                     // If object metadata is delete marker,
                     // call back NoSuchKey or MethodNotAllowed depending on specifying versionId
                     if (objectMD.isDeleteMarker) {
-                        let err = errors.NoSuchKey;
+                        let err = errorInstances.NoSuchKey;
                         if (decodedVidResult) {
-                            err = errors.MethodNotAllowed;
+                            err = errorInstances.MethodNotAllowed;
                         }
                         log.trace('version is a delete marker', { method: METHOD, error: err });
                         return next(err, bucketMD, objectMD);

lib/api/objectPut.js

@@ -24,6 +24,9 @@ const { overheadField } = require('../../constants');
 const versionIdUtils = versioning.VersionID;
 const { updateEncryption } = require('./apiUtils/bucket/updateEncryption');
 
+const invalidSSEError = errorInstances.InvalidArgument.customizeDescription(
+    'The encryption method specified is not supported');
+
 /**
  * PUT Object in the requested bucket. Steps include:
  * validating metadata for authorization, bucket and object existence etc.
@@ -95,8 +98,6 @@ function objectPut(authInfo, request, streamingV4Params, log, callback) {
         return callback(errors.EntityTooLarge);
     }
 
-    const invalidSSEError = errorInstances.InvalidArgument.customizeDescription(
-        'The encryption method specified is not supported');
     const requestType = request.apiMethods || 'objectPut';
     const valParams = { authInfo, bucketName, objectKey, versionId,
         requestType, request, withVersionId: isPutVersion };