Fix chai usage for chai5/chaihttp5

As chai only supports esm, not commjs since v5,
adjust the setup code to use dynamic imports.

See chaijs/chai#1578 for more.

Change-Id: I3c34043504bdf0c881eed4dabbe9e4fc8bb0b362

test/config/pretest.js

@@ -1,15 +1,18 @@
 /* eslint-disable @typescript-eslint/no-var-requires */
 //NOTE: Here we load and initialize some global variables that are used throughout the tests
 require("dotenv").config();
-var chaiHttp = require("chai-http");
+var chaiHttp;
+var chai;
 
 const { MongoClient } = require("mongodb");
 
 const client = new MongoClient(process.env.MONGODB_URI);
 
 async function loadChai() {
-  const { chai } = import("chai");
-  chai.use(chaiHttp);
+  chaiHttp = await import("chai-http");
+  await import("chai").then((result) => {
+	  chai = result.use(chaiHttp);
+	});
   await client.connect();
 }