adding useragent changes

All Submissions:

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• [YES/NO] I have added an explanation of what changes in this merge do and why we should include it?
• [YES/NO] I have updated the documentation accordingly.
• [YES/NO/NA] I have added tests to cover my changes.
• [YES/NO/NA] All new and existing tests passed.
• [YES/NO/NA] My code follows the code style of this project.
• [YES/NO/NA] I ran lint checks locally prior to submission.

What is the current behavior?

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Issue: Remember to link the workitem to this pull request.

What is the new behavior?

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AWS API calls can be tracked by useragent

Does this introduce a breaking change?

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• [YES/NO] No

Any relevant logs, error output, etc?

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(If it’s long, please paste to https://ghostbin.com/ and insert the link here.)

N/A

Other information

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changed milestone to %M18 - Release 0.21

added AWS label

assigned to @fhoueto.amz, @bios, and @ydzeng

AWS-Test-Java passes: https://community.opengroup.org/osdu/platform/security-and-compliance/legal/-/pipelines/185206

mentioned in commit 62fbee85

merged