Remove s3 arn variable as a requirement

[fossouo]

What does this PR do?

remove need of s3 arn variable, the data module provides the capability to get s3 arn from S3 Bucket Name

Motivation

This pull request will improve usage of MWAA Module

More

• [x] Yes, I have tested the PR using my local account setup (Provide any test evidence report under Additional Notes)
• [ ] Yes, I ran pre-commit run -a with this PR

For Moderators

• [ ] E2E Test successfully complete before merge?

Additional Notes