* Sebastian's HQC merge request

* Clean up changes to common infrastructure

* Fix Bitmask macro

It assumed that ``unsigned long`` was 64 bit

* Remove maxlen from nistseedexpander

It's a complicated thing to handle because the value is larger than size_t supports on 32-bit platforms

* Initialize buffers to help linter

* Add Nistseedexpander test

* Resolve UB in gf2x.c

Some of the shifts could be larger than WORD_SIZE_BITS, ie. larger than
the width of uint64_t. This apparently on Intel gets interpreted as the
shift mod 64, but on ARM something else happened.

* Fix Windows complaints

* rename log, exp which appear to be existing functions on MS

* Solve endianness problems

* remove all spaces before ';'

* Fix duplicate consistency

* Fix duplicate consistency

* Fix complaints by MSVC about narrowing int

* Add nistseedexpander.obj to COMMON_OBJECTS_NOPATH

* astyle format util.[ch]

* add util.h to makefile

* Sort includes in util.h

* Fix more Windows MSVC complaints

Co-authored-by: Sebastian Verschoor <sebastian@zeroknowledge.me>
Co-authored-by: Thom Wiggers <thom@thomwiggers.nl>

* Put AES ctx on the heap

This forces people to use the ``ctx_release`` functions, because otherwise there will be leaks

* Put fips202 on the heap

* Add much more docs for fips202.h

* fixup! Put fips202 on the heap

* Put SHA2 on the heap-supporting API

* Fix clang-tidy warnings

* Fix unreachable free() in falcon

* Fix McEliece8192128f-sse GNU Makefile

* Add state destroy to SHA2 API

* Include optimized SPHINCS+ implementations

I've generated new implementations from the sphincsplus repository.

* Don't destroy sha256ctx after finalize

* Attempt to shut up MSVC

* Make sure to drop errors in rmtree

CircleCI has AVX512 support and the compiler will generate instructions that Valgrind doesn't handle.

* Integrate Kyber-AVX2 into PQClean

* Fix types and formatting in Kyber

* Workaround a valgrind crash

* Remove comment in shuffle.s

* Remove some extraneous truncations

* fixup! Fix types and formatting in Kyber

* Move test support files into tests directory

* Fix common tests dir in test

* Fix Windows Makefile for common tests

* notrandombytes.obj should be in TEST_COMMON_DIR

* fix prototypes for sphincs and static functions in aes.c

* fix missing prototypes in all frodo variants

* fix missing prototypes in kyber

* remove const from non-pointer arguments in Frodo

* add missing prototypes to requirements in README

clang-format was not flexible enough to allow lining out things on
columns with spaces.

Hopefully stabilizes behaviour between versions.

Also fixes some tidy issues

Not sure why my local clang-tidy doesn't complain