* Update Dilithium

* Alternative montgomery reduce to avoid i386 functest errors

* Explicit casts for msvc

* More casts; bump upstream version; fix metadata

* another cast

* rainbow update

* update workflows

* re-add /O2 in nmake Makefile

* Fix a bunch of issues in SPHINCS+ on Windows
* Fix testing makefile dependencies by fixing times of common files
  (affected Windows testing mainly)

* remove automatically checked property

* Allow PR-submitters to self-document.

We don't ever use these, so allow submitters of PRs to self-document.

[ci skip]

The previous header size was a bit excessive, overshadowing actual comments.

[ci skip]