Go Examples - Operations audit

The newly created [Operations}(https://github.com/aws-samples/aws-dynamodb-examples/blob/master/examples/SDK/golang/Operations.md) page needs audit to ensure the operations that are listed in there actually have a matching example.

Start with examples/SDK/golang/Operations.md and inspect the Go examples in the surrounding examples/SDK/golang directory. Compare each operation listed on the page with the available examples. The audit is done when every listed operation has a matching example or any discrepancy is identified.

Written by the indexing model from the issue text.