fs: guard against undefined behavior

Calling close on a file description which is currently in use is
undefined behavior due to implementation details in libuv. Add
a guard against this when using FileHandle.

PR-URL: https://github.com/nodejs/node/pull/34746


Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: David Carlier <devnexen@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>