Files directory does not change name when output is named differently

[AlbertRapp]

Bug description

Issue

Using a different name of the output of a quarto file does not change the name of the additional directory with supporting files.
This happens both in RStudio as well as when calling

quarto render reprex.qmd --output test.html

Reprex

---
title: "reprex-quarto"
output-file: "test"
output-ext: "html"
---

This will create a 

- file `test.html` and a 

- directory called `reprex_files` (because I've named the Quarto file `reprex.qmd`)

OS

Distributor ID:	Ubuntu
Description:	Ubuntu 20.04.5 LTS
Release:	20.04
Codename:	focal

Checklist

• Please include a minimal, fully reproducible example in a single .qmd file? Please provide the whole file rather than the snippet you believe is causing the issue.
• Please format your issue so it is easier for us to read the bug report.
• Please document the RStudio IDE version you're running (if applicable), by providing the value displayed in the "About RStudio" main menu dialog?
• Please document the operating system you're running. If on Linux, please provide the specific distribution.

[cscheid]

Yes, that's a known issue. Unfortunately, the determination of the ${}_files name is currently intertwined with a number of other things, and it won't be quick or easy to fix.