node:net: reset the stream state when connect() reuses a half-closed socket - #38980

The `this._peername = null` and `this._sockname = null` assignments in the `if (this.destroyed)` block just above (net.ts:2125-2126) are now dead — the unconditional `initSocketHandle(this)` you added nulls both immediately after, and nothing between the two reads them. Only `this._handle = null` in that block is still load-bearing (it forces the fresh-detached-socket branch at line 2135); the other two lines can be deleted.

The `listen()` helper (and the inline `new Promise<void>(r => server.listen(socketPath, r))` in the unix-socket test) only resolves — it doesn't wire `server.once('error', reject)`. Consider adding it for consistency with the file's other tests and the REVIEW.md convention ("Wire EVERY failure event … to reject the awaited promise"), e.g. `new Promise<number>((resolve, reject) => { server.once('error', reject); server.listen(0, '127.0.0.1', () => resolve(...)); })`.