Build file templates: don't set OPENSSL_{ENGINES,MODULES}

Since we've now switched to use util/wrap.pl to wrap uninstalled
programs everywhere, there's no need to set the environment variables
OPENSSL_ENGINES and OPENSSL_MODULES globally for the tests.

Reviewed-by: Matthias St. Pierre <Matthias.St.Pierre@ncp-e.com>
(Merged from https://github.com/openssl/openssl/pull/11110)