Client Side Input Validation

[Smithx10]

While working with the AWS ECS client library I noticed they have a input.Validate() function which verifies inputs client side. Might be useful to have this.

[twhiteman]

A good idea in general. This could then be used by consuming libraries like the Terraform Triton provider.

Example:
https://docs.aws.amazon.com/sdk-for-go/api/service/ec2/#CreateImageInput.Validate
https://docs.aws.amazon.com/sdk-for-go/api/service/ec2/#DeleteSnapshotInput.Validate