Backport of chore(e2e): Add GetUserPolicy permission to service user into release/0.14.x

[hc-github-team-secure-boundary]

Backport

This PR is auto-generated from #3877 to be assessed for backporting due to the inclusion of the label backport/0.14.x.

The below text is copied from the body of the original PR.

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This PR updates the permissions for the AWS user used in CI to include iam:GetUserPolicy. We started seeing failures last night due to...

Error: waiting for IAM User Policy (boundary-e2e-EMvkM:boundary_e2e_EMvkM) create: AccessDenied: User: arn:aws:sts::173905499206:assumed-role/github_actions-boundary_enterprise_ci/GitHubActions is not authorized to perform: iam:GetUserPolicy on resource: user boundary-e2e-EMvkM because no identity-based policy allows the iam:GetUserPolicy action
	status code: 403, request id: 6b2f6782-c305-4d22-bdb4-f4bf8c0148e1

  with module.iam_setup.aws_iam_user_policy.boundary,
  on ../../modules/aws_iam_setup/main.tf line 20, in resource "aws_iam_user_policy" "boundary":
  20: resource "aws_iam_user_policy" "boundary" {
  Validate: success!
  Plan: success!

I've already applied the changes to the user and the failures have been resolved. This PR is just checking the terraform changes.