[Bug]: python-test-examples using depreciated moto syntax

### Contact Details

pjdavis@amazon.co.uk

### Runtime

Python

### What happened?

Some python examples are not fixing the version of moto imported.  The tests are using the old depreciated syntax e.g. `from moto import mock s3` rather than the new syntax `from moto import mock_aws`.  See https://github.com/getmoto/moto/blob/master/CHANGELOG.md#500

### Relevant log output

```shell

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