Add MQ User resource v5.31.0

[mergenci]

Description

MQ User resource is currently managed inside MQ Broker resource. This PR implements MQ User as an independent resource. Note that a Broker restart is required for any MQ User operations to take effect.

References

• On how to introduce a new Terraform resource, see Add new service package Support and new resource Case #132
• Also see PR for v5.50.0: Add MQ User resource v5.50.0 #245

[github-actions]

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[ulucinar]

Thank you @mergenci for introducing the aws_mq_user resource. We had better avoid any dependency changes in the go.mod files. Was this a side effect of changing the base?

[erhancagirici]

@mergenci many thanks for the great work. This also serves as a good reference for new TF resource implementations. LGTM!
A small but important note is: in a follow-up, it would be nice to document/automate this process for version bumps.

[mergenci]

Thanks for your reviews @ulucinar and @erhancagirici 🙏

[github-actions]

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