WIP: Add AWS EKS authentication docs for GDK
Proposes a flow for authenticating with AWS EKS when using GDK.
Within our AWS test account, this means:
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Creating a global IAM User gitlab-local-userwith programmatic access
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Creating a global policy for the IAM User gitlab-local-user-policythat allows it to assume any role whose name ends with-local-provision-role
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Creating a global policy for provision roles gitlab-local-role-policy
With 1Password, this means:
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Adding an entry for AWS gitlab-local-userwhich includes theAccount ID,Access key ID, andSecret access key
Edited  by Thong Kuah