fix failing nationNameLength test (#2556)

## Description:

Fixes the failing nationNameLength.test by usinbg the proper absolute
path glob syntax

Also switches to fast-glob because I don't see a reason to not use it.

## Please complete the following:

- [x] I have added screenshots for all UI updates
- [x] I process any text displayed to the user through translateText()
and I've added it to the en.json file
- [x] I have added relevant tests to the test directory
- [x] I confirm I have thoroughly tested these changes and take full
responsibility for any bugs introduced

## Please put your Discord username so you can be contacted if a bug or
regression is found:

Lavodan

tests/NationNameLength.test.ts

@@ -1,6 +1,5 @@
 import fs from "fs";
 import { globSync } from "glob";
-import path from "path";
 
 type Nation = {
   name?: string;
@@ -12,9 +11,7 @@ type Manifest = {
 
 describe("Map manifests: nation name length constraint", () => {
   test("All nations' names must be ≤ 27 characters", () => {
-    const manifestPaths = globSync(
-      path.resolve(process.cwd(), "resources/maps/**/manifest.json"),
-    );
+    const manifestPaths = globSync("resources/maps/**/manifest.json");
 
     expect(manifestPaths.length).toBeGreaterThan(0);