Update examples for s3 bucket notifications and sqs queue policies

[mbbush]

Description of your changes

• Made BucketNotification.s3 uptestable
• Made QueuePolicy.sqs uptestable
• Test both sqs and sns notifications in BucketNotification.s3

Addresses a comment someone made in slack about having problems with bucket notifications

I have:

• [x] Read and followed Crossplane's contribution process.
• [x] Run make reviewable to ensure this PR is ready for review.
• [ ] Added backport release-x.y labels to auto-backport this PR if necessary.

How has this code been tested

[mbbush]

/test-examples="examples/s3/v1beta1/bucketnotification.yaml"

[mbbush]

/test-examples="examples/v1beta1/sqs/queuepolicy.yaml"

[mbbush]

/test-examples="examples/sqs/v1beta1/queuepolicy.yaml"

[mbbush]

The failing uptest run was just because I typo'd the example name.

[mbbush]

Commits merged into #1213 to help test that change to sqs queue policy