B2B-2658: Implement GraphQL Resolver Cache for Customer query

- class method must correspond interface

Author: rganin

app/code/Magento/GraphQlResolverCache/Model/Resolver/Result/ValueProcessor.php

@@ -69,7 +69,7 @@ public function processCachedValueAfterLoad(ResolverInterface $resolver, string
     /**
      * @inheritdoc
      */
-    public function preProcessParentValue(&$value): void
+    public function preProcessParentValue(array &$value): void
     {
         $this->hydrateData($value);
     }

app/code/Magento/GraphQlResolverCache/Model/Resolver/Result/ValueProcessorInterface.php

@@ -25,7 +25,7 @@ interface ValueProcessorInterface
     public function processCachedValueAfterLoad(ResolverInterface $resolver, string $cacheKey, &$value): void;
 
     /**
-     * Preprocess parent resolver resolved array for currently executed resolver.
+     * Preprocess parent resolver resolved array for currently executed array-element resolver.
      *
      * @param array $value
      * @return void