fix: update message when expecting S3 to throw

[rtpascual]

Description of changes

Currently S3 access E2E tests are looking for Access Denied when expecting user group that does not have permissions to interact with S3 bucket. The new message received is now something like:

User: <user group arn> is not authorized to perform: s3:GetObject on resource: <S3 bucket> because no identity-based policy allows the s3:GetObject action

Update E2E test to expect not authorized to perform instead of Access Denied.

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Description of how you validated changes

Checklist

• PR description included
• yarn test passes
• Tests are changed or added
• Relevant documentation is changed or added (and PR referenced)
• New AWS SDK calls or CloudFormation actions have been added to relevant test and service IAM policies
• Pull request labels are added

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