feat(NODE-7335): Create dedicated mocha runner with isolated vm context

.gitignore

@@ -108,3 +108,5 @@ uri.txt
 crypt_shared.sh
 
 *keytab
+driver.bundle.js
+test/tools/runner/bundle/

etc/build-runtime-barrel.mjs

@@ -0,0 +1,21 @@
+import fs from 'node:fs/promises';
+import path from 'node:path';
+import { fileURLToPath } from 'node:url';
+
+// eslint-disable-next-line no-restricted-globals
+const useBundled = process.env.MONGODB_BUNDLED === 'true';
+
+const __dirname = path.dirname(fileURLToPath(import.meta.url));
+const rootDir = path.join(__dirname, '..');
+const outputBarrelFile = path.join(rootDir, 'test/mongodb_runtime-testing.ts');
+const source = useBundled ? './mongodb_bundled' : './mongodb';
+
+const contents =
+  `// This file is auto-generated. Do not edit.\n` +
+  `// Run 'npm run build:runtime-barrel' to regenerate.\n` +
+  `export const runNodelessTests = ${useBundled};\n` +
+  `export * from '${source}';\n`;
+await fs.writeFile(outputBarrelFile, contents);
+
+// eslint-disable-next-line no-console
+console.log(`✓ ${outputBarrelFile} now re-exports from ${source}`);

etc/bundle-driver.mjs

@@ -0,0 +1,52 @@
+#!/usr/bin/env node
+import fs from 'node:fs/promises';
+import { isBuiltin } from 'node:module';
+import path from 'node:path';
+import { fileURLToPath } from 'node:url';
+
+import * as esbuild from 'esbuild';
+
+const __dirname = path.dirname(fileURLToPath(import.meta.url));
+const rootDir = path.join(__dirname, '..');
+
+const outdir = path.join(rootDir, 'test/tools/runner/bundle/');
+await fs.rm(outdir, { recursive: true, force: true });
+
+const outputBundleFile = path.join(outdir, 'driver-bundle.js');
+await esbuild.build({
+  entryPoints: [path.join(rootDir, 'test/mongodb.ts')],
+  bundle: true,
+  outfile: outputBundleFile,
+  platform: 'node',
+  format: 'cjs',
+  target: 'node20',
+  external: [
+    'bson',
+    'mongodb-connection-string-url',
+    '@mongodb-js/saslprep',
+    '@mongodb-js/zstd',
+    'mongodb-client-encryption',
+    'snappy',
+    '@napi-rs/snappy*',
+    'kerberos',
+    'gcp-metadata',
+    '@aws-sdk/credential-providers'
+  ],
+  plugins: [
+    {
+      name: 'externalize-node-builtins',
+      setup(build) {
+        build.onResolve({ filter: /.*/ }, args => {
+          if (isBuiltin(args.path)) {
+            return { path: args.path, external: true };
+          }
+        });
+      }
+    }
+  ],
+  sourcemap: 'inline',
+  logLevel: 'info'
+});
+
+// eslint-disable-next-line no-console
+console.log(`✓ Driver bundle created at ${outputBundleFile}`);