openssl: export OPENSSL_MODULES in the wrapper

OpenSSL 3 added the concept of provider modules which are loaded from
disk.  The load path is hard-coded into the library and needs to be
relocated when running natively, so add OPENSSL_MODULES to the wrapper.

Signed-off-by: Ross Burton <ross.burton@arm.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>