Add Content Type OID for RPKI id-ct-signedTAL

Add Content Type OID for RPKI id-ct-signedTAL

References: draft-ietf-sidrops-signed-tal
Title: "RPKI Signed Object for Trust Anchor Key"

OID permanently assigned under 'SMI Security for S/MIME CMS Content Type (1.2.840.113549.1.9.16.1)'
https://www.iana.org/assignments/smi-numbers/smi-numbers.xhtml#security-smime-1

CLA: trivial

Reviewed-by: Hugo Landau <hlandau@openssl.org>
Reviewed-by: Paul Dale <pauli@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/19221)