add iam_managed_policy_attachment module

[rbobrowicz]

SUMMARY

There is no existing module for attaching managed policies to iam entities. iam_managed_policy can create managed policies, but iam_policy can only attach inline policies. This PR adds iam_managed_policy_attachment to fill the gap.

We've been using this at my work for close to a year, I decided to clean it up and make a PR. It addresses ansible/ansible#31999

ISSUE TYPE

• New Module Pull Request

COMPONENT NAME

iam_managed_policy_attachment

ADDITIONAL INFORMATION

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[tremble]

Hi @rbobrowicz

Sorry it's taken so long to get back to you and thank you for the time you've taken in writing the module and opening this PR.

The iam_user, iam_group and iam_role modules have a 'managed_policies' parameter which I think achieves what this module is trying to do, is there a specific use case that you feel is missed by the managed_policies parameters?

[rbobrowicz]

Huh, I guess I either missed those or that wasn't around when I first ran into this issue. When I tried to figure out how to attach managed policies in the past I stumbled into the issue I linked in my opening PR which suggested these features weren't available, so I rolled my own and thought I'd contribute it back. I'll take a closer look at the'managed_policies paramater tomorrow and close the PR if my module is no longer required.