crypto/bio/bio_print.c: consolidating print arguments in a structure

crypto/bio/bio_print.c: consolidating print arguments in a structure

buffer/sbuffer/maxlen/currlen are passed together between _dopr, fmt*,
and doapr_outch;  consolidate them together in a structure and pass
it instead.  A preparatory commit before introducing a separate "write
position" parameter, that is also to be passed around.

Signed-off-by: Eugene Syromiatnikov <esyr@openssl.org>
Reviewed-by: Saša Nedvědický <sashan@openssl.org>
Reviewed-by: Neil Horman <nhorman@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/28177)