Remove conflicting S3 bucket ACL resource from Terraform configuration

This release implements minor changes to the Terraform files regarding S3 access.
If “Bucket owner enforced” is active for your S3 bucket, ACLs are effectively disabled. Attempting to set them via Terraform (aws_s3_bucket_acl) will fail with AccessControlListNotSupported. See hashicorp/terraform-provider-aws#34079

v4.0.0

BREAKING:

• Changed from KIAM auth to IRSA.
  See https://wiki.dfds.cloud/en/teams/devex/operations/guides/kiam-to-irsa-migration.
  KIAM is deprecated and will be removed in the future. We are now using IRSA and ServiceAccounts to assume roles in
  AWS.

v3.0.0

• Bumped AWS provider dependency to >= 4.0
• Fix breaking change with S3 bucket provisioning in the new version

v2.0.0

Fixes breaking changes after upgrading to terraform 1.0.0

v1.0.0

Merged PR 46002: Set up CI with Azure Pipelines