feat: Add variable to allow changing tag condition on Karpenter iam-role-for-service-accounts-eks policy

[bryantbiggs]

Description

• Add variable to allow changing tag condition on Karpenter iam-role-for-service-accounts-eks policy

Motivation and Context

• Could not launch node, launching instances, with fleet error(s), UnauthorizedOperation: You are not authorized to perform this operation. aws/karpenter-provider-aws#1488 (comment)
• This change will give users more control over the IAM condition of the Karpenter policy, allowing for situations where multiple clusters in the same account are provisioned with Karpenter managing scaling

Breaking Changes

• No, current static value is now the default variable value

How Has This Been Tested?

• I have updated at least one of the examples/* to demonstrate and validate my change(s)
• I have tested and validated these changes using one or more of the provided examples/* projects

• I have executed pre-commit run -a on my pull request

[antonbabenko]

This PR is included in version 4.19.0 🎉

[github-actions]

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