feat: add GetQueueAttributes to SQS policy (#11)

For AWS ControlTower integration using SSO, "sqs:GetQueueAttributes" is required. While as of 0.15 this permission is added to the cross-account role policy, it has not yet been added to the SQS Access Policy, causing CloudTrail integration to encounter 403 errors.

**How did you test this change?**

Replicated issue in a personal account and ControlTower using SSO, updated Access Policy for SQS queue manually to add sqs:GetQueueAttributes permission for the cross-account role, and CloudTrail integration began populating without errors.

main.tf

@@ -56,7 +56,8 @@ resource "aws_sqs_queue_policy" "lacework_sqs_queue_policy" {
 			},
 			"Action": [
 				"sqs:DeleteMessage",
-				"sqs:ReceiveMessage"
+				"sqs:ReceiveMessage",
+				"sqs:GetQueueAttributes"
 			      ],
 			"Resource": "${aws_sqs_queue.lacework_cloudtrail_sqs_queue.arn}"
 		}