* Fix typos in comments.
* Add documentation of how to use multiple keys with `aws_secretsmanager` function.
* Move `Client` struct to `secretsmanager.go` file.
This change fixes an issue where using the `disk_additional_size` configuration option would cause builds to fail.
Build results before the change
```
==> Builds finished but no artifacts were created.
Build 'azure-arm' errored: Code="DeploymentFailed" Message="At least one resource deployment operation failed. Please list deployment operations for details. Please see https://aka.ms/DeployOperations for usage details." Details=[{"code":"BadRequest","message":"{\r\n \"error\": {\r\n \"code
\": \"InvalidParameter\",\r\n \"message\": \"The entity name 'dataDisk.name' is invalid according to its validation rule: ^[^_\\\\W][\\\\w-._]{0,79}(?\u003c![-.])$.\",\r\n \"target\": \"dataDisk.name\"\r\n }\r\n}"}]
```
Build results after change
```
Build 'azure-arm' finished.
==> Builds finished. The artifacts of successful builds are:
--> azure-arm: Azure.ResourceManagement.VMImage:
OSType: Linux
ManagedImageResourceGroupName: test-pkr
ManagedImageName: wilkenPacker9249
```
Closes#9249
This change reduces the retry timeout from 5m to 1m, and sets the
RetryDelay to 10s for a total of 6 retries. In additional to the retry
time reduction the cleanup script will now check to see if the
provisioner script created by Packer exists before trying to delete to
prevent any file not found issues.
Closes#9181Closes#9189