[ci] R macOS and Windows jobs failing with errors related to installing LaTeX tools

[jameslamb]

Description

For the last 2 days, all R macOS CI jobs have been failing with errors like the following

==> Running `brew cleanup qpdf`...
==> Caveats
You must restart your terminal window for the installation of MacTex CLI tools to take effect.
Alternatively, Bash and Zsh users can run the command:

  eval "$(/usr/libexec/path_helper)"

==> Downloading https://mirror.ctan.org/systems/mac/mactex/mactex-basictex-20220314.pkg
==> Downloading from https://mirror.math.princeton.edu/pub/CTAN/systems/mac/mactex/mactex-basictex-20220314.pkg
curl: (22) The requested URL returned error: 404
Error: Download failed on Cask 'basictex' with message: Download failed: https://mirror.ctan.org/systems/mac/mactex/mactex-basictex-20220314.pkg
Error: Process completed with exit code 2[55](https://github.com/microsoft/LightGBM/actions/runs/4497187259/jobs/7935165656#step:8:56).

And all CRAN-style Windows R CI jobs have been failing with errors like the following encountered during R CMD check.

* checking PDF version of manual ... WARNING
LaTeX errors when creating PDF version.
This typically indicates Rd problems.
* checking PDF version of manual without hyperrefs or index ... ERROR
Re-running with no redirection of stdout/stderr.
Hmm ... looks like a package
Error in texi2dvi(file = file, pdf = TRUE, clean = clean, quiet = quiet,  : 

  pdflatex is not available

Error in texi2dvi(file = file, pdf = TRUE, clean = clean, quiet = quiet,  : 

  pdflatex is not available

You may want to clean up by 'rm -Rf Error in running tools::texi2pdf()
C:/Users/RUNNER~1/AppData/Local/Temp/Rtmp61WeNc/Rd2pdfee030646015'

Reproducible example

See, for example, recent builds from master: https://github.com/microsoft/LightGBM/actions/runs/4497187259/jobs/7935166021

Additional Comments

Not the first time that TeX installation has broken this project's CI 😭

• [ci] installing 'basictex' from homebrew failing in macOS builds #4160
• [ci] R macOS CI jobs failing on 'brew install basictex' #5128

[github-actions]

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