[Enhancement]: support image id override in aws_ec2_fleet

[cfbao]

Description

The override block in the aws_ec2_fleet resource doesn't currently support overriding image ID, but the AWS API does already support it:
https://docs.aws.amazon.com/AWSEC2/latest/APIReference/API_FleetLaunchTemplateOverridesRequest.html

This makes launching an EC2 fleet of mixed AMIs impossible via Terraform, because launch_template_config is also constrained to exactly one, when the underlying CreateFleet API allows a maximum of 50.

Affected Resource(s) and/or Data Source(s)

• aws_ec2_fleet

Potential Terraform Configuration

No response

References

https://docs.aws.amazon.com/AWSEC2/latest/APIReference/API_CreateFleet.html
https://docs.aws.amazon.com/AWSEC2/latest/APIReference/API_FleetLaunchTemplateOverridesRequest.html

Would you like to implement a fix?

Yes

[github-actions]

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[github-actions]

This functionality has been released in v4.57.0 of the Terraform AWS Provider. Please see the Terraform documentation on provider versioning or reach out if you need any assistance upgrading.

For further feature requests or bug reports with this functionality, please create a new GitHub issue following the template. Thank you!

[github-actions]

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