aexpr should keep Object.defineProperty config an object

```
Object.defineProperty(_recorder_.tempfile_js, 'expect', {
get() {
return expect;
},
```
gets rewritten to:

```
Object.defineProperty(_recorder_._src_client_reactive_test_active_expression_proxies_active_expression_proxies_spec_js, 'expect', _wrap({
```

But it should be an Object, and a Proxy raised an error.

Start by reproducing the Object.defineProperty example from the issue and trace the aexpr rewrite that changes its descriptor argument to _wrap({...}). Confirm how the rewritten call causes the Proxy error. Done means the descriptor remains an object through this transformation and the example no longer raises that error.

Written by the indexing model from the issue text.