Use path to determine plugin version

PR: https://github.com/iocage/iocage/pull/1196

Some pkgs have dependencies with versions listed and in this case the regex being used is unable to determine which version is actually the main pkg ones. We take a different approach and use path of the pkg to determine pkg version.

Make sure to follow and check these boxes before submitting a PR! Thank you.

• [ ] Explain the feature
• [ ] Read [CONTRIBUTING.md](https://github.com/iocage/iocage/blob/master/CONTRIBUTING.md)