Add EKS Deny Public Resources Policy Pack

[rajlearner17]

This commit introduces a new policy pack for AWS EKS that enforces private endpoint access by denying clusters with public endpoint access. It includes a custom approval mechanism allowing exceptions through tagging, along with comprehensive documentation and Terraform configuration files for deployment.

[Copilot]

Pull Request Overview

This PR introduces a new Terraform policy pack for AWS EKS that enforces private endpoint access by denying clusters with public endpoint access enabled, while providing an exception mechanism through tagging.

• Implements a custom approval policy that evaluates EKS clusters based on their public endpoint access configuration
• Provides exception handling through a specific tag (turbot:deny-public-resources:exception = "true")
• Includes comprehensive documentation and deployment configuration files

Reviewed Changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 1 comment.

File	Description
providers.tf	Defines Terraform provider requirements for the Turbot provider
policies.tf	Implements the main policy logic with custom approval template for EKS cluster evaluation
main.tf	Creates the policy pack resource with title and description
README.md	Provides comprehensive documentation including usage, policy logic, and security benefits

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[Copilot]

This commented line should be removed or expanded with proper documentation explaining when to use enforcement vs check mode, as it provides incomplete guidance for users.

Suggested change

	value = "Check: Approved"
	value = "Check: Approved"
	# To change the policy from "Check" mode to "Enforce" mode, uncomment the line below.
	#
	# "Check" mode will only report on clusters that are not approved, without taking any action.
	# "Enforce" mode will automatically delete any new EKS clusters that are not approved according to the policy logic.
	#
	# Use "Enforce" mode only if you want Turbot to actively remove unapproved clusters, which may impact running workloads.
	# Recommended: Start with "Check" mode to review findings before enabling enforcement.