chore: remove direct usage from graphql (#9316)

**What**
Remove direct usage of graphql toold and instead consume it from utils to have a single entry point to graphql tooling

packages/core/modules-sdk/src/remote-query/__fixtures__/get-entities-map.ts

@@ -1,13 +1,15 @@
-import { mergeTypeDefs } from "@graphql-tools/merge"
-import { makeExecutableSchema } from "@graphql-tools/schema"
-import { cleanGraphQLSchema } from "@medusajs/utils"
+import { GraphQLUtils } from "@medusajs/utils"
 
 export function getEntitiesMap(loadedSchema): Map<string, any> {
   const defaultMedusaSchema = `
     scalar DateTime
     scalar JSON
   `
-  const { schema } = cleanGraphQLSchema(defaultMedusaSchema + loadedSchema)
-  const mergedSchema = mergeTypeDefs(schema)
-  return makeExecutableSchema({ typeDefs: mergedSchema }).getTypeMap() as any
+  const { schema } = GraphQLUtils.cleanGraphQLSchema(
+    defaultMedusaSchema + loadedSchema
+  )
+  const mergedSchema = GraphQLUtils.mergeTypeDefs(schema)
+  return GraphQLUtils.makeExecutableSchema({
+    typeDefs: mergedSchema,
+  }).getTypeMap() as any
 }