Job API socket mounting prevents use of plugin on OSX via Docker Desktop

[mipearson]

Version 5.12 with fix #275 appears to stop the docker plugin from working on OSX via Docker Desktop as bind mounting sockets between Linux/OSX isn't supported, and there doesn't seem to be a way to disable this functionality in the plugin settings.

$ docker run -t -i --rm --init --volume /opt/homebrew/var/buildkite-agent/builds/<redacted>/mp-test/buildkite-practical-example:/workdir --workdir /workdir --env BUILDKITE_AGENT_JOB_API_SOCKET --env BUILDKITE_AGENT_JOB_API_TOKEN --volume /Users/mp/.buildkite-agent/sockets/job-api/65031-30866.sock:/Users/mp/.buildkite-agent/sockets/job-api/65031-30866.sock <redacted>
  | 2025-02-11 11:14:28 UTC | docker: Error response from daemon: error while creating mount source path '/host_mnt/Users/mp/.buildkite-agent/sockets/job-api/65031-30866.sock': mkdir /host_mnt/Users/mp/.buildkite-agent/sockets/job-api/65031-30866.sock: operation not supported.

Reverting to version 5.11 appears to avoid this issue and the plugin works as intended.