Don't try to chown/chmod on Windows

[pendo324]

Summary

Stops trying to chown/chmod EBS volumes on Windows

Implementation details

Simple exclusion of the function call based on platform

Testing

Description for the changelog

Fixes EBS volumes failing to mount on Windows due to chown/chmod

Additional Information

Does this PR include breaking model changes? If so, Have you added transformation functions?
No

Does this PR include the addition of new environment variables in the README?
No

Licensing

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

[pendo324]

PTAL at the new revision @singholt @kiryl1.

I tried to split the logic between platforms as sanely as possible

[singholt]

PTAL at the new revision @singholt @kiryl1.

I tried to split the logic between platforms as sanely as possible

Thank you. Please update the unit tests too. See failing PR check. Also rebase your base branch against the dev branch in this repo. The failing static check is fixed by #4834