New input variable s3_object_ownership

[bcarranza]

Describe the Feature

In the case where we do not want to use ACL, we want to use the s3_object_ownership entry to force that only the account that owns the s3 bucket can use it, i mean: s3_object_ownership = "BucketOwnerEnforced"

Expected Behavior

Have this input variable available in this project https://github.com/cloudposse/terraform-aws-cloudtrail-s3-bucket/blob/master/variables.tf

Use Case

We have an internal cloudtrail, we will not use it from different accounts.