add optional access logs target bucket Resolves #764

[xnick123]

What does this PR do?

Allows user to configure an access-logs target bucket, were access-logs of the forwarder bucket will be stored. This helps resolving AWS Security HUB S3.9 finding (more info in the issue related)

Motivation

Allow users to decide if they want a target access log bucket.

Testing Guidelines

Deployed the cloudformation template.yml with the addition made.

Additional Notes

Types of changes

• Bug fix
• New feature
• Breaking change
• Misc (docs, refactoring, dependency upgrade, etc.)

Check all that apply

• This PR's description is comprehensive
• This PR contains breaking changes that are documented in the description
• This PR introduces new APIs or parameters that are documented and unlikely to change in the foreseeable future
• This PR impacts documentation, and it has been updated (or a ticket has been logged)
• This PR's changes are covered by the automated tests
• This PR collects user input/sensitive content into Datadog
• This PR passes the integration tests (ask a Datadog member to run the tests)
• This PR passes the unit tests
• This PR passes the installation tests (ask a Datadog member to run the tests)

[xnick123]

@ViBiOh Thanks for testing! Yes it was conflicting with my previous contribution. Merge conflict resolved, ping me if anything else is needed.