There's a merged pull request on the void-packages repository

runit-void: Standardise/improve os-release
https://github.com/void-linux/void-packages/pull/35604

Description:
#### Testing the changes
- I tested the changes in this PR: **YES**

- - -

This PR aims to bring the `os-release` file up to the same quality and standards as in other distributions.

There was a prior attempt to update `os-release` (#12160), but that included some fairly unusual departures; here I have made a point to change as little as possible while still providing useful and expected functionality.

I did leave the `DISTRIB_ID` variable intact, despite it not being part of the specification. Hopefully this will prevent any compatibility issues.

- - -

Special interest pings (for feedback):
@the-maldridge for Ansible compatibility.
@Vaelatern for Salt Stack compatibility.