fix errtest to be less sensitive to line wrapping changes

fix errtest to be less sensitive to line wrapping changes

(in it's final form it will work with either compiler
because it's currently one line, but was tripped up before
by the #ifdef, so redid it to be consistent with the
other changes previously in this stack)

While I am here correct the test to test for all possible
return values of ERR_get_error_all, without the #ifdefs

Reviewed-by: Saša Nedvědický <sashan@openssl.org>
Reviewed-by: Nikola Pajkovsky <nikolap@openssl.org>
Reviewed-by: Tomas Mraz <tomas@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/29241)