There is an updated pull request by tornaria against master on the void-packages repository

https://github.com/tornaria/void-packages octave
https://github.com/void-linux/void-packages/pull/40720

octave: update to 7.3.0.
- Fix cross build
- Use SuiteSparse
- Use rapidjson
- Use --disable-docs to skip building docs, instead install the docs in
  the tarball. This way we don't need texlive/texinfo/gnuplot to build.
- Avoid warnings due to egrep deprecation
- xlint fixes


<!-- Uncomment relevant sections and delete options which are not applicable -->

#### Testing the changes
- I tested the changes in this PR: **briefly**

---

I wonder if we really want all those build options. I am tempted to remove almost all of them.

I also wonder if the choice of `GraphicsMagick` over `ImageMagick` is the best one.

NOTE: this PR includes #39846 for the current SuiteSparse. Could work with the current SuiteSparse, but I didn't try (#39846 is ready to merge IMO; the CI failures in that PR are addressed in the comments)

<!--
#### New package
- This new package conforms to the [package requirements](https://github.com/void-linux/void-packages/blob/master/CONTRIBUTING.md#package-requirements): **YES**|**NO**
-->

<!-- Note: If the build is likely to take more than 2 hours, please add ci skip tag as described in
https://github.com/void-linux/void-packages/blob/master/CONTRIBUTING.md#continuous-integration
and test at least one native build and, if supported, at least one cross build.
Ignore this section if this PR is not skipping CI.
-->
<!--
#### Local build testing
- I built this PR locally for my native architecture, (ARCH-LIBC)
- I built this PR locally for these architectures (if supported. mark crossbuilds):
  - aarch64-musl
  - armv7l
  - armv6l-musl
-->


A patch file from https://github.com/void-linux/void-packages/pull/40720.patch is attached