Missing close binding for exported grep result

### I confirm that...

- [X] I have searched the [issue tracker](https://github.com/doomemacs/doomemacs/issues), [documentation](https://docs.doomemacs.org), [FAQ](https://docs.doomemacs.org/-/faq), [Discourse](https://discourse.doomemacs.org), and [Google](https://google.com), in case this issue has already been reported/resolved.

- [X] I have read "[How to Debug Issues](https://doomemacs.org/d/how2debug)", and will use it to provide as much information about this issue as possible.

- [X] The issue can be reproduced on the **latest** available commit of Doom.

- [X] The issue can be reproduced on a stable release of Emacs, such as 27, 28, or 29. *(Unstable versions end in .50, .60, or .9x)*

### Expected behavior

When exporting search results using embark-export, the popup created should be closed when pressing `ESC` or `q` just like `occur`.

### Current behavior

Pressing `ESC` or `q` does not close exported grep results buffer. Need to close it via `SPC w 0` (`close-window-or-workspace`).

### Steps to reproduce

1. Search project using `SPC s p`, having configured `vertico` as the completion engine.
2. Export search results `C-;`
3. Inside the exported search result, press `ESC` or `q`... nothing happens

### System Information

https://gist.github.com/rakanalh/b1acccc4f76f60744125f8bc42bddfd0