There is a new pull request by zlice against master on the void-packages repository

https://github.com/zlice/void-packages ci-fetch-once
https://github.com/void-linux/void-packages/pull/50571

CI fetch pkgs once

#### Testing the changes
- I tested the changes in this PR: **YES**|**briefly**|**NO**


#### Comments

Fetch packages a single time in the contianer prep stage so it isn't done for every arch+libc.

A patch file from https://github.com/void-linux/void-packages/pull/50571.patch is attached