Fixup gentest-validate when directories have folders

Summary: This reworks `gentest-validate`, to be more resilient to changes like D58307002, which cause [validation failures](https://github.com/facebook/yoga/actions/runs/9653979292/job/26627690870) due to the file traversal code not handling the presence of directories.

Differential Revision: D58987293

javascript/just.config.cjs

@@ -23,7 +23,7 @@ const {
 const {existsSync} = require('fs');
 const {readFile, writeFile, rm} = require('fs/promises');
 
-const glob = require('glob');
+const {glob} = require('glob');
 const path = require('path');
 const which = require('which');
 

javascript/package.json

@@ -38,14 +38,13 @@
     "@babel/core": "^7.23.0",
     "@babel/preset-env": "^7.23.0",
     "@babel/preset-typescript": "^7.23.0",
-    "@types/glob": "^8.1.0",
     "@types/jest": "^29.5.1",
     "@types/node": "^16.18.25",
     "@types/which": "^3.0.0",
     "@yogalayout/cmake-bin": "3.28.0-1",
     "babel-register-esm": "^1.2.5",
     "clang-format": "^1.8.0",
-    "glob": "^8.0.3",
+    "glob": "^10.4.2",
     "jest": "^29.3.1",
     "just-scripts": "^2.1.0",
     "ninja-binaries": "^1.11.1",