fix: add missing codegen config for mixed template for iOS

Author: satya164

packages/create-react-native-library/templates/common/$package.json

@@ -167,7 +167,7 @@
         }
       ]
     ]
-<% if (project.arch === "new") { -%>
+<% if (project.arch !== 'legacy') { -%>
   },
   "codegenConfig": {
     "name": "RN<%- project.name -%><%- project.view ? 'View': '' -%>Spec",

packages/create-react-native-library/templates/common/CONTRIBUTING.md

@@ -57,7 +57,7 @@ yarn clean
 ```
 
 <% } -%>
-<% if (project.arch === 'new' || project.arch === 'mixed') { -%>
+<% if (project.arch !== 'legacy') { -%>
 To confirm that the app is running with the new architecture, you can check the Metro logs for a message like this:
 
 ```sh

packages/create-react-native-library/templates/native-common/{%- project.identifier %}.podspec

@@ -11,7 +11,7 @@ Pod::Spec.new do |s|
   s.license      = package["license"]
   s.authors      = package["author"]
 
-  s.platforms    = { :ios => <%- project.arch === "new" ? '"11.0"': '"10.0"' -%> }
+  s.platforms    = { :ios => "11.0" }
   s.source       = { :git => "<%- repo -%>.git", :tag => "#{s.version}" }
 
 <% if (project.cpp) { -%>
@@ -32,7 +32,7 @@ Pod::Spec.new do |s|
         "OTHER_CPLUSPLUSFLAGS" => "-DFOLLY_NO_CONFIG -DFOLLY_MOBILE=1 -DFOLLY_USE_LIBCPP=1",
         "CLANG_CXX_LANGUAGE_STANDARD" => "c++17"
     }
-<% if(project.arch === "new" && project.view) { -%>
+<% if (project.view) { -%>
     s.dependency "React-RCTFabric"
 <% } -%>
     s.dependency "React-Codegen"