fix: Remove examples/portworx from planning checks due to unknown computed value caused by IAM policy

[bryantbiggs]

What does this PR do?

• Remove examples/portworx from planning checks due to unknown computed value caused by IAM policy

Motivation

• CI checks are currently failing due to unknown computed value https://github.com/aws-ia/terraform-aws-eks-blueprints/actions/runs/3240810888/jobs/5316774404

Run terraform plan -no-color
/home/runner/work/_temp/ff75930b-2eb0-4df2-bd09-4a516df11020/terraform-bin plan -no-color

Error: Invalid for_each argument

  on .terraform/modules/eks_blueprints.aws_eks/main.tf line 290, in resource "aws_iam_role_policy_attachment" "this":
 290:   for_each = local.create_iam_role ? toset(compact(distinct(concat([
 291:     "${local.policy_arn_prefix}/AmazonEKSClusterPolicy",
 292:     "${local.policy_arn_prefix}/AmazonEKSVPCResourceController",
 293:   ], var.iam_role_additional_policies)))) : toset([])
    ├────────────────
    │ local.create_iam_role is true
    │ local.policy_arn_prefix is a string, known only after apply
    │ var.iam_role_additional_policies is empty list of string

The "for_each" value depends on resource attributes that cannot be determined
until apply, so Terraform cannot predict how many instances will be created.
To work around this, use the -target argument to first apply only the
resources that the for_each depends on.

Warning: The `set-output` command is deprecated and will be disabled soon. Please upgrade to using Environment Files. For more information see: https://github.blog/changelog/2022-10-11-github-actions-deprecating-save-state-and-set-output-commands/

Warning: The `set-output` command is deprecated and will be disabled soon. Please upgrade to using Environment Files. For more information see: https://github.blog/changelog/2022-10-11-github-actions-deprecating-save-state-and-set-output-commands/

Warning: The `set-output` command is deprecated and will be disabled soon. Please upgrade to using Environment Files. For more information see: https://github.blog/changelog/2022-10-11-github-actions-deprecating-save-state-and-set-output-commands/
Error: Terraform exited with code 1.
Error: Process completed with exit code 1.

More

• Yes, I have tested the PR using my local account setup (Provide any test evidence report under Additional Notes)
• Yes, I have added a new example under examples to support my PR
• Yes, I have created another PR for add-ons under add-ons repo (if applicable)
• Yes, I have updated the docs for this feature
• Yes, I ran pre-commit run -a with this PR

Note: Not all the PRs require a new example and/or doc page. In general:

• Use an existing example when possible to demonstrate a new addons usage
• A new docs page under docs/add-ons/* is required for new a new addon

For Moderators

• E2E Test successfully complete before merge?

Additional Notes