Implement a mock Netlify global based upon the published NetlifyGlobal interface

We no longer publish the actual implementation of our Netlify global for edge functions, we only publish the types

This file is used for parsing the 'in-source configuration' - which is why using a simple implementation for the Netlify global such as the one provided should be good enough

Her eis the previous PR which added the Netlify global into this file for context -- netlify/edge-bundler#427

Author: JakeChampion

packages/edge-bundler/deno/config.ts

@@ -1,9 +1,23 @@
-// this needs to be updated whenever there's a change to globalThis.Netlify in bootstrap
-import { Netlify } from "https://64e8753eae24930008fac6d9--edge.netlify.app/bootstrap/index-combined.ts"
+import { type NetlifyGlobal } from 'https://edge.netlify.com/bootstrap/globals/types.ts'
 
 const [functionURL, collectorURL, rawExitCodes] = Deno.args
 const exitCodes = JSON.parse(rawExitCodes)
 
+const env = {
+  delete: Deno.env.delete,
+  get: Deno.env.get,
+  has: Deno.env.has,
+  set: Deno.env.set,
+  toObject: Deno.env.toObject,
+};
+
+const Netlify: NetlifyGlobal = {
+  get context() {
+    return null;
+  },
+  env,
+};
+
 globalThis.Netlify = Netlify
 
 let func