Replumbing: make the oneshot proider cipher function like the others

Replumbing: make the oneshot proider cipher function like the others

The OP_cipher_final function takes a return output size and an output
buffer size argument.  The oneshot OP_cipher_cipher function should do
the same.

Reviewed-by: Matt Caswell <matt@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/8849)