Process Templated Entries in aws-auth configmap in Kubernetes Module

[shyammukund]

Issue: Right now kubernetes module (specifically the eks functionality) only processes non-templated entries from the aws auth map. Being able to process the templated entries would give much better coverage

Description:

According to this aws-auth template there are three cases of templating for map roles:

1. {{AccountID}}
2. {{SessionName}}
3. {{SessionNameRaw}}

• For {{AccountID}} Just replace with AWS account ID that is in the rolearn
• If an AWS role maps to a username or group with {{SessionName}} or {{SessionNameRaw}}, we should map that AWS role to all Kube groups or kube users in rolebindings that could match the format of the username. Some regex likely required here.

[optional Relevant Links:]

Existing Kube Functionality

[kunaals]

Adding onto this, most roles can be assumed with an arbitrary session name. The exception here are roles created by AWS identity center in permissionsets