[CI] Fix beachball publish

[Saadnajmi]

Please select one of the following

• I am removing an existing difference between facebook/react-native and microsoft/react-native-macos 👍
• I am cherry-picking a change from Facebook's react-native into microsoft/react-native-macos 👍
• I am making a fix / change for the macOS implementation of react-native
• I am making a change required for Microsoft usage of react-native

Summary:

Our CI was not properly running beachball publish. I traced this to two issues:

1. We weren't actually passing in the NPM auth token to beachball. This seems to be a typo from an earlier PR refactoring the publish yml.
2. One of the packages we inherit from upstream (@react-native/community-cli-plugin) was trying to get published. This was probably introduced / added in a merge, and we didn't add the beachball : { shouldPublish: false } section to our package.json to account. Let's just fix that

Changelog:

[INTERNAL] [FIXED] - Fix beachball publish

Test Plan:

CI should pass.