refactor(dev-infra): share more github code between commands (#38656)

Instead of repeating the logic for adding the github token to
a repository git url, we add a shared function for automatically
computing the URls with token.

Additionally, URLs for updating/generating tokens have been moved
to a dedicated file in the `utils` folder. Also while being at it,
the yargs github token helper is also moved into the dedicated
Git/Github related util folder.

PR Close #38656

dev-infra/utils/git/github.ts

@@ -84,7 +84,6 @@ class GithubGraphqlClient {
     }
   }
 
-
   /** Perform a query using Github's GraphQL API. */
   async query<T extends GraphQLQueryObject>(queryObject: T, params: RequestParameters = {}) {
     const queryString = query(queryObject);