test ubuntu 18 ARM

[emmettbutler]

This pull request adds Ubuntu 18 arm64 to the list of operating systems tested with auto-instrumentation.

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[robertomonteromiguel]

You added the ubuntu 18 arm vm as not default vm, it is not going to execute on "extra vms" job.
Running other jobs I see this error:
06:37:03.584 INFO * creating EC2 Instance: InvalidParameterValue: The t2.medium instance type does not support an AMI with a boot mode of UEFI. Only instance types built on the Nitro System support UEFI. Specify an instance type that supports UEFI, and try again.
The arm vms should be of type "t4g.small"

[emmettbutler]

@robertomonteromiguel

You added the ubuntu 18 arm vm as not default vm, it is not going to execute on "extra vms" job.

I don't see the difference between this change and how I approached the Fedora change. What do I need to change on this PR?

[robertomonteromiguel]

You need to choose another AMI, because this one requires a subscription:

06:41:04.772 INFO aws:ec2:Instance (Ubuntu_18_arm64): 06:41:04.772 INFO error: 1 error occurred: 06:41:04.773 INFO * creating EC2 Instance: OptInRequired: In order to use this AWS Marketplace product you need to accept terms and subscribe. To do so please visit https://aws.amazon.com/marketplace/pp?sku=c32m5ohwwfzz4h6g2anowwufo 06:41:04.773 INFO status code: 401, request id: 6f963b00-0c57-45a9-bb3e-21f185c654bf