[Middleware] Parameters Secrets lambda extension

[willfarrell]

Closes #1262

There isn't much documentation on this Lambda extension, so this is highly POC until someone test for real and can report back the actual response structure (specifically when the requested item is not found).

Todo List:

• [x] Feature/Fix fully implemented
• [x] All commits are cryptographically signed
• [x] Updated relevant types
• [x] Added tests (if applicable)
  • [x] Unit tests - missing tests when item is not found or timeout
  • [x] Fuzz tests
  • [x] Type tests
  • [x] Benchmark tests
• [ ] Updated relevant documentation
• [ ] Updated relevant examples

Docs

• https://docs.aws.amazon.com/systems-manager/latest/userguide/ps-integration-lambda-extensions.html
• https://docs.aws.amazon.com/secretsmanager/latest/userguide/retrieving-secrets_lambda.html