bugfixes:
  - na_ontap_s3_buckets - fix options that cannot be modified if not set in creating s3 buckets.
  - na_ontap_s3_buckets - fix TypeError if ``conditions`` not present in policy statements.
  - na_ontap_s3_buckets - updated correct choices in options ``audit_event_selector.access`` and ``audit_event_selector.permission``.