.devcontainer/downstream-archlinux-latest: Fix maxima

[mkoeppe]

Dev container configurations .devcontainer/downstream-* give easy access to Sage as provided by downstream packagers (see https://doc.sagemath.org/html/en/developer/portability_testing.html#using-our-pre-built-docker-images-for-development-in-vs-code, bottom).

Unfortunately maxima is defective when the archlinux sage package is installed in the official archlinux Docker container because of NoExtract directives that make the maxima help system inoperable.

Here we apply the same fix that we used in #36391 for the portability CI: Removing the NoExtract directives before installing the package.

📝 Checklist

• The title is concise, informative, and self-explanatory.
• The description explains in detail what this PR is about.
• I have linked a relevant issue or discussion.
• I have created tests covering the changes.
• I have updated the documentation accordingly.

⌛ Dependencies

[github-actions]

Documentation preview for this PR (built with commit 966fb86; changes) is ready! 🎉

[kwankyu]

This is for the case that a user works in vs code with .devcontainer/downstream-archlinux-latest and attempts to build sage in the worktree. If I am right, is this a realistic case?

Anyway I tried, and got

...
[patch-2.7.5] Moving package files from temporary location /workspaces/sage-dev/local/var/tmp/sage/build/patch-2.7.5/inst to /workspaces/sage-dev/local
[patch-2.7.5] cp: preserving permissions for '/workspaces/sage-dev/local/./bin/patch': No data available
[patch-2.7.5] cp: preserving permissions for '/workspaces/sage-dev/local/./share/man/man1/patch.1': No data available
[patch-2.7.5] ************************************************************************
[patch-2.7.5] Error moving files for patch-2.7.5.

and did not even reach to the doc build stage...

[mkoeppe]

Apologies for neglecting to write a proper PR description, fixed now.

Building Sage from source is not a goal in this container

[kwankyu]

What I don't understand is this: "Removing the NoExtract directives before installing the package." Does installing the archlinux sage package fail because of the NoExtract directives?

[mkoeppe]

Does installing the archlinux sage package fail because of the NoExtract directives?

No, installation goes through, but it's broken at runtime.

[kwankyu]

OK. This PR works well. The portability dev containers are very useful!

[mkoeppe]

Thanks!