There is an updated pull request by Emru1 against master on the void-packages repository

https://github.com/Emru1/void-packages openttd_opts
https://github.com/void-linux/void-packages/pull/53017

openttd: packs as options
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#### Testing the changes
- I tested the changes in this PR: **YES**
#### Local build testing
- I built this PR locally for my native architecture, amd64-glibc


I've moved resource packs behind vopts, as they are not obligatory to run OpenTTD.
Also I provided option to build only dedicated server.
Furthermore I've disabled tests that required resource packs to be present during testing.

A patch file from https://github.com/void-linux/void-packages/pull/53017.patch is attached