Add Go Credential Provider Example

[siennathesane]

This pull request introduces a new example for using AWS SDK with LocalStack in Go. The example demonstrates how to configure AWS credentials and interact with AWS SQS service using LocalStack.

Changes:

1. Makefile:

   • Added a run target to execute the Go example.

2. go.mod:

   • Initialized a new Go module.
   • Added dependencies for AWS SDK v1 and v2.

3. go.sum:

   • Added checksums for the dependencies.

4. main.go:

   • Implemented functions to configure AWS credentials for LocalStack.
   • Demonstrated creating, sending, receiving, and deleting messages in an SQS queue.

How to Test:

1. Navigate to the go/credentialprovider directory.
2. Run make run to execute the example.
3. Verify the output for successful creation, message operations, and deletion of the SQS queue.