Restore Dynamic framework with JSC in the Old Architecture

Summary:
I discovered that 0.69 and 0.70 could run React Native as Dynamic framework with JSC and starting from 0.71 that's not possible anymore.
This diff restore that possibility.

## Changelog
[iOS][Fixed] - Add Back dynamic framework support for the old architecture

Reviewed By: cortinico

Differential Revision: D42829137

fbshipit-source-id: 848672f714d8bab133e42f5e3b80202b350d5261

Author: cipolleschi

React-Core.podspec

@@ -114,4 +114,8 @@ Pod::Spec.new do |s|
   s.dependency "React-jsiexecutor", version
   s.dependency "Yoga"
   s.dependency "glog"
+
+  if ENV['USE_HERMES'] == "0"
+    s.dependency 'React-jsc'
+  end
 end

React/CoreModules/React-CoreModules.podspec

@@ -44,4 +44,5 @@ Pod::Spec.new do |s|
   s.dependency "React-RCTImage", version
   s.dependency "ReactCommon/turbomodule/core", version
   s.dependency "React-jsi", version
+  s.dependency 'React-RCTBlob'
 end