* 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

The previous formatting did not immediately stabilize,
and the resulting formatting is somewhat arbitrary.
Manually inserting linebreaks seems to make more sense.