dmg: use compatible service name for config and socket

[daipom]

To align with Linux service definition.

[daipom]

https://github.com/fluent/fluent-package-builder/blob/7c8d1f25055826a574cfa9dcb17ea1ac4528507d/fluent-package/templates/etc/systemd/fluentd.service.erb#L14-L16

[daipom]

This will solve the failure of

• 477

I'm testing it on my fork: https://github.com/daipom/fluent-package-builder/actions/runs/5063945296

[daipom]

This will solve the failure of

* [dmg: add install test #477](https://github.com/fluent/fluent-package-builder/pull/477)

I'm testing it on my fork: https://github.com/daipom/fluent-package-builder/actions/runs/5063945296

Success!

[ashie]

Thanks!

[daipom]

Thanks for merging!