fix: add mising subpsec to React-Fabric podspec (#48023)

Summary:
Running app with static linking fails to compile. Probably during https://github.com/facebook/react-native/pull/43581 adding that code was overlooked since the analogous thing seems to be added: https://github.com/facebook/react-native/pull/43581/files#diff-6680f6849631e3dcc5897ee3961a9d6d2bc57aff3eccb79a9d9c634183276202R566.

cc rubennorte since you made the linked PR.

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[IOS] [FIXED] - Add missing subpsec to React-Fabric podspec.

Pull Request resolved: https://github.com/facebook/react-native/pull/48023

Test Plan: Run https://github.com/WoLewicki/reproducer-react-native/tree/%40wolewicki/static-linking-with-live-markdown and see that it won't compile without this change.

Reviewed By: cipolleschi

Differential Revision: D66600486

Pulled By: cortinico

fbshipit-source-id: 9de64541e49d27cdf00f37942adab6620476f15a

packages/react-native/ReactCommon/React-Fabric.podspec

@@ -221,6 +221,13 @@ Pod::Spec.new do |s|
 
   end
 
+  s.subspec "consistency" do |ss|
+    ss.dependency             folly_dep_name, folly_version
+    ss.compiler_flags       = folly_compiler_flags
+    ss.source_files         = "react/renderer/consistency/**/*.{m,mm,cpp,h}"
+    ss.header_dir           = "react/renderer/consistency"
+  end
+
   s.subspec "uimanager" do |ss|
     ss.subspec "consistency" do |sss|
       sss.dependency             folly_dep_name, folly_version