[client] Missing the X509V3ExtensionsType fields on X509Certificate

Add the missing fields on x509certificate creation

Source: V6.8.8

Problem to Solve

When creating the observable entity X509Certificate, the fields coming from X509V3ExtensionsType are not mapped.

entity fields	mapped in pycti
basic_constraints	❌
name_constraints	❌
policy_constraints	❌
key_usage	❌
extended_key_usage	❌
subject_key_identifier	❌
authority_key_identifier	❌
subject_alternative_name	❌
issuer_alternative_name	❌
subject_directory_attributes	❌
crl_distribution_points	❌
inhibit_any_policy	❌
private_key_usage_period_not_before	❌
private_key_usage_period_not_after	❌
certificate_policies	❌
policy_mappings	❌

Create the entity without this fields

Add the fields' mapping