Support enabling EC2 Instance Tags in metadata service in Launch Tempate

Issue Summary:

AWS just announced that finally, EC2 instance tags are available via Instance Metadata Service.

This is enabled via a field in the Launch Template's metadata options, setting instanceMetadataTags="enabled" (see https://github.com/aws/aws-sdk-java/blob/b6154fee2be0d4eca66c068233c04d157604b264/aws-java-sdk-ec2/src/main/java/com/amazonaws/services/ec2/model/LaunchTemplateInstanceMetadataOptionsRequest.java#L504-L528)

Cloud Provider(s):

AWS

Environment:

EC2

Feature Area:

Clouddriver

Description:

This will probably just require a bump to Netflix/AWSObjectMapper and AWS Java SDK, as this was introduced in AWS SDK 1.12.135

Steps to Reproduce:

Additional Details:

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