gh-35619: upgrade Maxima to 5.46.0
### :books: upgrade Maxima to 5.46.0
Our 5.45.0 is getting old. This will fix #32898 as well.
We have one mild regression found while working on #35615 (already
reported upstream),
but number of improvements in a number of places. As #35615 is a part
of this PR branch,
I propose to review them all here.
We also promote `info` spkg to standard, and make it install
`makeinfo/texi2any`, to deal with Maxima docs.
This allows us to simplify configuration/installation of Maxima and ECL.
### :memo: Checklist
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- [x] The title is concise, informative, and self-explanatory.
- [x] The description explains in detail what this PR is about.
- [x] I have linked a relevant issue or discussion.
- [ ] I have created tests covering the changes.
- [ ] I have updated the documentation accordingly.
### :hourglass: Dependencies
#35615 - provide `spkg-configure.m4` for Maxima
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URL: https://github.com/sagemath/sage/pull/35619
Reported by: Dima Pasechnik
Reviewer(s): Dima Pasechnik, François Bissey, Gonzalo Tornaría, Matthias Köppe, Mauricio Collares, Michael Orlitzky
