Fix Memory leak in CMS_EncryptedData_set1_key

Fix Memory leak in CMS_EncryptedData_set1_key

When CMS_EncryptedData_set1_key is called repeatedly it will
leak data on the second call. This was because
cms->d.encryptedData was already set and needed to be cleared
before the call to M_ASN1_new_of.

Fixes: #28606
Reviewed-by: Shane Lontis <shane.lontis@oracle.com>
Reviewed-by: Matt Caswell <matt@openssl.org>
Reviewed-by: Tomas Mraz <tomas@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/28668)