This PR is a follow-up to #39090 and addresses two issues:

* Moves `conpty.dll` and `OpenConsole.exe` out of the `bin` folder to
prevent other programs from using them.
* Updates these files only after Zed exits, avoiding update failures due
to file locks.


Release Notes:

- N/A

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Co-authored-by: Jakub Konka <kubkon@jakubkonka.com>