Fix memleak in rsa_cms_sign error path

If the call to X509_ALGOR_set0 fails then the allocated ASN1_STRING
variable passed as parameter leaks.  Fix by explicitly freeing like
how all other codepaths with X509_ALGOR_set0 do.

Fixes #22680

Reviewed-by: Neil Horman <nhorman@openssl.org>
Reviewed-by: Tomas Mraz <tomas@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/24868)

(cherry picked from commit 5efc57ca)