Fix Hermes not being downloaded on RC5

[cortinico]

Summary

With RC5, we're not effectively downloading the Hermes tarball from the Github releases. Here the fix.

Changelog

[Internal] - Fix Hermes not being downloaded on RC5 on iOS

Test Plan

This PR should be merged on the release branch alongside this cherry-pick:
f1775ba

How I tested this.

1. npx react-native init RN069 --version next --skip-install
2. Replicate the aformentioned cherry-pick with: echo "hermes-2022-05-20-RNv0.69.0-ee8941b8874132b8f83e4486b63ed5c19fc3f111" > node_modules/react-native/sdks/.hermesversion
3. Apply this PR to the react_native_pods.rb file.
4. Enable Hermes inside the Podfile
5. Edit the following file to point to a tarball on my fork (which doesn't contain the extra .podspec inside it): node_modules/react-native/sdks/hermes-engine/hermes-engine.podspec

if version == '1000.0.0'
  Pod::UI.puts '[Hermes] Hermes needs to be compiled, installing hermes-engine may take a while...'.yellow if Object.const_defined?("Pod::UI")
  source[:git] = git
  source[:commit] = `git ls-remote https://github.com/facebook/hermes main | cut -f 1`.strip
elsif currentremote.strip.end_with?("facebook/react-native.git") and currentbranch.strip.end_with?("-stable")
  Pod::UI.puts '[Hermes] Detected that you are on a React Native release branch, building Hermes from source...'.yellow if Object.const_defined?("Pod::UI")
  source[:git] = git
  source[:commit] = `git ls-remote https://github.com/facebook/hermes main | cut -f 1`.strip
else
+ source[:http] = "https://github.com/cortinico/react-native/releases/download/v#{version}/hermes-runtime-darwin-v#{version}.tar.gz"
- source[:http] = "https://github.com/facebook/react-native/releases/download/v#{version}/hermes-runtime-darwin-v#{version}.tar.gz"
end

6. Run pod install
7. Run the app with npx react-native run-ios