test: work around ENOTEMPTY when cleaning tmp dir

Replace the homegrown rimrafsync implementation in test/common with
a call to `fs.rmdirSync(path, { recursive: true })`.

Fixes: https://github.com/nodejs/node/issues/30620
Fixes: https://github.com/nodejs/node/issues/30844

PR-URL: https://github.com/nodejs/node/pull/30849


Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>