[16.3.x-beta] Setup release branch

[eps1lon]

Same as 1c772d7 but for next-16-3-beta

test plan

with auth disabled

diff --git a/lerna.json b/lerna.json
index b35d16256b..07d1edb326 100644
--- a/lerna.json
+++ b/lerna.json
@@ -11,7 +11,7 @@
       "npmClient": "npm",
       "allowBranch": [
         "canary",
-        "next-16-3-preview"
+        "sebbie/setup-beta-release"
       ],
       "registry": "https://registry.npmjs.org/"
     }
diff --git a/scripts/start-release.js b/scripts/start-release.js
index 12f344e097..ba19218eaf 100644
--- a/scripts/start-release.js
+++ b/scripts/start-release.js
@@ -58,12 +58,12 @@ async function main() {
   const config = new ConfigStore('release')
   config.set('token', githubToken)
 
-  await configureGitHubAuth(githubToken)
-  await verifyGitHubApiAccess(
-    githubToken,
-    '/repos/vercel/next.js/releases?per_page=1',
-    'release lookup'
-  )
+  // await configureGitHubAuth(githubToken)
+  // await verifyGitHubApiAccess(
+  //   githubToken,
+  //   '/repos/vercel/next.js/releases?per_page=1',
+  //   'release lookup'
+  // )
 
   console.log(`Running pnpm release-${isCanary ? 'canary' : 'stable'}...`)

$ RELEASE_GITHUB_TOKEN=1 node ./scripts/start-release.js --release-type preview --semver-type patch

commits 16.3.0-preview.0 as the version.

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[vercel]

Additional Suggestion:

A preview release bumps the version and creates the release commit but skips the actual pnpm release --pre publish step because the final publish guard omits isPreview.