feat(amplify-codegen-appsync-model-plugin): iOS add suport for auth (a…

…ws-amplify#4329)

Updated model gen to add authRules when @auth directive is used in schema
A schema with @auth directive 
type Post @model @auth(rules: [{ allow: owner }]) {
    id: ID!
    title: String!
    owner: String!
}

will generate the following authRule in Post+schema.swift

import Amplify
import Foundation
extension Post {
   
  public static let schema = defineSchema { model in
    let post = Post.keys
    
    model.authRules = [
      rule(allow: .owner, ownerField: "owner", identityClaim: "cognito:username", operations: [.create, .update, .delete, .read])
    ]
    
    model.pluralName = "Posts"
    
    }
}

packages/amplify-codegen-appsync-model-plugin/src/__tests__/utils/process-auth.test.ts

@@ -86,7 +86,7 @@ describe('process auth directive', () => {
       const processedAuthDirective = processAuthDirective(directives);
       expect(processedAuthDirective[0].arguments.rules[0]).toEqual({
         ...ownerAuthRule,
-        operations: [AuthModelOperation.create, AuthModelOperation.update, AuthModelOperation.delete],
+        operations: [AuthModelOperation.create, AuthModelOperation.update, AuthModelOperation.delete, AuthModelOperation.read],
       });
     });
 
@@ -164,7 +164,7 @@ describe('process auth directive', () => {
       const processedAuthDirective = processAuthDirective(directives);
       expect(processedAuthDirective[0].arguments.rules[0]).toEqual({
         ...groupsAuthRule,
-        operations: [AuthModelOperation.create, AuthModelOperation.update, AuthModelOperation.delete],
+        operations: [AuthModelOperation.create, AuthModelOperation.update, AuthModelOperation.delete, AuthModelOperation.read],
       });
     });
   });