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

CI: unify path handling
https://github.com/void-linux/void-packages/pull/39829

Description:
This `PATH` change was introduced in #39309, and parts of it felt kind of hacked on. This streamlines it

- .github/workflows/build.yaml: add /usr/libexec/chroot-git to PATH
- common/: remove PATH adds from CI scripts

#### Testing the changes
- I tested the changes in this PR: **YES** - https://github.com/void-linux/void-packages/actions/runs/3213065830