Update: Shorten provisioning, enable pre-provision of infrastructure and support new workshop structure - fundamentals/storage/fsxn lab

[mickeysh]

What this PR does / why we need it:

• Support new EKS workshop structure - including new IAM policies
• Shorten provisioning times
• Support pod identity
• Enable infrastructure pre provision

Which issue(s) this PR fixes:

• Issues with lab provisioning times
• remove marketplace add-on usage
• Switch from OIDC to Pod Identity for CSI driver
• Move FSxN base infrastructure to pre-provision module
• Add IAM policy for FSxN infrastructure to EKS Workshop IAM module

Quality checks

• [V] My content adheres to the style guidelines
• [V] I ran make test module="<module>" it was successful (see https://github.com/aws-samples/eks-workshop-v2/blob/main/docs/automated_tests.md)
• [V] The PR has meaningful title and description of the changes that will be included in the workshop release notes

By submitting this pull request, I confirm that you can use, modify, copy, and redistribute this contribution, under the terms of your choice.

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