We add the concept of preparation recipes, which are performed
unconditionally. They are all expected to match the pattern
test/recipes/00-prep_*.t.
We add one such preparation recipe, test/recipes/00-prep_fipsmodule_cnf.t,
which helps us generate a test specific fipsmodule.cnf, to be used by
all other tests.
Fixes#15166
Reviewed-by: Tomas Mraz <tomas@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/15436)
