Fix releases and nightlies after moving hermes to Hermes repo (#54257)

Summary:
Pull Request resolved: https://github.com/facebook/react-native/pull/54257

When moving Hermes to the Hermes repo, we mistakenly updated the nightly and the publish_release job to depend on an non-existing job

## Changelog:
[Internal] - Fix CI jobs for nightlies and releases

Reviewed By: huntie

Differential Revision: D85422837

fbshipit-source-id: 18d4ef73c80032b55f09f27e4b58b399f0a148c9

.github/workflows/nightly.yml

@@ -60,7 +60,6 @@ jobs:
     needs:
       [
         set_release_type,
-        prepare_workspace,
         build_android,
         prebuild_apple_dependencies,
         prebuild_react_native_core,

.github/workflows/publish-release.yml

@@ -34,7 +34,6 @@ jobs:
     needs:
       [
         set_release_type,
-        prepare_workspace,
         prebuild_apple_dependencies,
         prebuild_react_native_core,
       ]