Playground CLI: /wordpress subdirs cannot be mounted before WP install

[brandonpayton]

The following Playground CLI command fails during the boot process while attempting to unzip WordPress:

DEBUG=* npx @wp-playground/cli server --mount-dir-before-install './database' '/wordpress/wp-content/database/'

The error is:

Fetching SQLite integration plugin...
Booting WordPress...
error Error: Could not move /tmp/unzipped-wordpress/wordpress to /wordpress: Device or resource busy.
    at Function.mv (/Users/mjangda/dev/vip/sandbox/wordpress-playground/packages/php-wasm/universal/src/lib/fs-helpers.ts:115:10)
    at PHP.mv (/Users/mjangda/dev/vip/sandbox/wordpress-playground/packages/php-wasm/universal/src/lib/php.ts:1077:20)
    at unzipWordPress (/Users/mjangda/dev/vip/sandbox/wordpress-playground/packages/playground/wordpress/src/index.ts:545:7)
    at async bootWordPress (/Users/mjangda/dev/vip/sandbox/wordpress-playground/packages/playground/wordpress/src/boot.ts:146:3)
    at async PlaygroundCliWorker.boot (/Users/mjangda/dev/vip/sandbox/wordpress-playground/packages/playground/cli/src/worker-thread.ts:135:27) {
  [cause]: ErrnoError { name: 'ErrnoError', errno: 10 }
}

Reported by @mjangda