[s3] Prevent constant reconcile/diff discovery due to spaces/newlines in policy

[shabbskagalwala]

Describe the bug
The s3 controller constantly keeps reconciling detecting diffs on the policy object due to newlines/spaces.

A similar fix was added to
IAM: aws-controllers-k8s/iam-controller#85
DynamoDb: https://github.com/aws-controllers-k8s/dynamodb-controller/pull/154/files#diff-92a3fc64711cf4756e675efdd8ed0e62674d460e517cf14675242254dd96f685R143

Steps to reproduce

Expected outcome
Frequent reconciles due to newlines/spaces should not occur as the policy content is the same

Environment

• Kubernetes version
• Using EKS (yes/no), if so version?
• AWS service targeted (S3, RDS, etc.)

[github-actions]

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[a-hilaly]

Currently waiting for micahhausler/aws-iam-policy#1 to make it to micah's aws-iam-policy library :)