Support IAM role attachment and replacement for existing EC2 instance

[anosulchik]

Hi there,

This is more feature request than an issue. AWS announced possibility to attach and change IAM roles for EC2 instances, it would be more than great to have this functionality in next version of terraform. Thanks!

https://aws.amazon.com/blogs/security/new-attach-an-aws-iam-role-to-an-existing-amazon-ec2-instance-by-using-the-aws-cli/?sc_channel=sm&sc_campaign=rolesforrunninginstances&sc_publisher=tw&sc_medium=social&sc_content=read-post&sc_country=global&sc_geo=global&sc_category=ec2&sc_outcome=launch

[ghost]

I'm going to lock this issue because it has been closed for 30 days ⏳. This helps our maintainers find and focus on the active issues.

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