Add support for Oracle OKE environment

[jasonmccampbell]

Description, Motivation and Context

Adds "OKE" as a distribution type and strings for Oracle Cloud Infrastructure.

Fixed: 4116

Checklist

• New and existing tests pass locally with introduced changes.
• Tests for the changes have been added (for bug fixes / features)
• The commit message(s) are informative and highlight any breaking changes
• Any documentation required has been added/updated. For changes to https://troubleshoot.sh/ create a PR here

Does this PR introduce a breaking change?

• Yes
• No

Please let me know if there are unit tests or documentation I should update; I didn't see anything relevant.

[CLAassistant]

All committers have signed the CLA.

[xavpaice]

Hi, thanks for the contribution! This is a useful feature, we appreciate you taking the time to PR it. I'll merge this now, it'll go out in the next release (hopefully within the next few days).