enable dupword linter

[korovindenis]

Description

Added a new golang-lint dupword plugin to the project. This plugin is designed to detect duplicate words in Go source code and helps maintain code cleanliness and readability by identifying and eliminating repeated words.

Links

https://github.com/Abirdcfly/dupword

PR Checklist

• [ ] updated test coverage
• [ ] external facing docs updated
• [ ] appropriate backport labels added
• [x] not a security concern

[hashicorp-cla]

All committers have signed the CLA.

[github-actions[bot]]

This pull request has been automatically flagged for inactivity because it has not been acted upon in the last 60 days. It will be closed if no new activity occurs in the next 30 days. Please feel free to re-open to resurrect the change if you feel this has happened by mistake. Thank you for your contributions.