iam_user_info doesn't return tag properly

[c5162357]

Summary

Tags of iam_user_info are not properly returned.

Issue Type

Bug Report

Component Name

iam_user_info

Ansible Version

$ ansible --version

Collection Versions

$ ansible-galaxy collection list

AWS SDK versions

$ pip show boto boto3 botocore

Configuration

$ ansible-config dump --only-changed

OS / Environment

No response

Steps to Reproduce

Expected Results

tags of iam_user properly returned

Actual Results

Code of Conduct

• I agree to follow the Ansible Code of Conduct

[kristianheljas]

The module uses ListUsers to list users which does not return tags.
And there was a bug where it actually should have called GetUser which would have returned tags.

These and some additional fixes in #2567