POC - Pinpoint SMS Voice SendTextMessage

[k-macmillan]

Description

This was a POC to see if SMS could be sent with send_text_message. This would allow us to use:
PhoneNumber, PhoneNumberId, PhoneNumberArn, SenderId, SenderIdArn, PoolId, or PoolArn.

It uses a different mechanism to send messages and receive updates. This work setup the send message part but did not identify how to receive updates. Without further investigation we cannot implement this.

This did require a bit of effort on Infra to get it functional.

issue N/A

How Has This Been Tested?

Success!

Checklist

• I have assigned myself to this PR
• PR has an appropriate title: #9999 - What the thing does
• PR has a detailed description, including links to specific documentation
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• I have added tests that prove my fix is effective or that my feature works. Testing guidelines
• I have ensured the latest main is merged into my branch and all checks are green prior to review
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