[firebase-release] Removed change log and reset repo after 11.27.0 release

Author: google-oss-bot

CHANGELOG.md

@@ -1,4 +0,0 @@
-- Default emulators:start to use fast dev-mode for Nuxt3 applications (#5551)
-- Fix broken Functions CLI experience for projects with incomplete GCF 2nd Gen functions (#5684)
-- Disable GCF breaking change to automatically run npm build scripts as part of function deploy (#5687)
-- Add experimental support for deploying Astro applications to Hosting (#5527)