TeX file is not moved to output-dir

Reproduce the issue with the project configuration in _quarto.yml and the keep-tex setting in test.qmd, then trace the PDF export and output-dir handling in the Quarto CLI. Done means rendering places both test.pdf and the retained test.tex file in outdir instead of leaving the .tex file in the project directory.

Bug description

When exporting to PDF, and keep-tex: true and output-dir: "outdir" are both set in the relevant YAML, the .tex file remains in the working directory, even after the .pdf file is moved to outdir.

Reprex

1. Create a new Quarto project, with the following contents in the _quarto.yml file:

   project:
     title: "test"
     output-dir: "outdir"
   

2. Create a test.qmd file with the following contents:

   ---
   title: "test"
   format:
     pdf:
       keep-tex: true
   ---
   
   Hello
   

3. Render the project. Observe that test.pdf is in the outdir subdirectory, but test.tex remains in the project directory.

System Stats

Results of quarto check:

[✓] Checking Quarto installation......OK
      Version: 0.9.637
      Path: /Applications/quarto/bin

[✓] Checking basic markdown render....OK

[✓] Checking Python 3 installation....OK
      Version: 3.9.6 (Conda)
      Path: /Users/connor/opt/miniforge/bin/python
      Jupyter: (None)

      Jupyter is not available in this Python installation.
      Install with conda install jupyter

[✓] Checking R installation...........OK
      Version: 4.2.1
      Path: /Library/Frameworks/R.framework/Resources
      LibPaths:
        - /Library/Frameworks/R.framework/Versions/4.2-arm64/Resources/library
      rmarkdown: 2.14

[✓] Checking Knitr engine render......OK

RStudio Version 2022.02.3 Build 492. Session Info:

R version 4.2.1 (2022-06-23)
Platform: aarch64-apple-darwin20 (64-bit)
Running under: macOS Monterey 12.4

Matrix products: default
LAPACK: /Library/Frameworks/R.framework/Versions/4.2-arm64/Resources/lib/libRlapack.dylib

locale:
[1] en_US.UTF-8/en_US.UTF-8/en_US.UTF-8/C/en_US.UTF-8/en_US.UTF-8

attached base packages:
[1] stats     graphics  grDevices utils     datasets  methods   base     

loaded via a namespace (and not attached):
[1] compiler_4.2.1 tools_4.2.1   

Checklist

• formatted your issue so it is easier for us to read?
• included a minimal, self-contained, and reproducible example?
• documented the quarto version you're running, by providing the output produced by quarto check in a terminal in your issue?
• documented the RStudio IDE version you're running (if applicable), by providing the value displayed in the "About RStudio" main menu dialog?
• documented which operating system you're running? If on Linux, please provide the specific distribution as well.
• upgraded to the latest version, including your versions of R, the RStudio IDE, and relevant R packages?