Fix disable_for_health setting

[petersenlutz]

The serve.public.request_log.disable_for_health and serve.admin.request_log.disable_for_health settings are not honored at present.

The reason is an incorrect setting reference at:
https://github.com/ory/hydra/blob/ce589462a48853f16ed8447cadf17293b5eb6ab7/oryx/configx/serve.go#L66C4-L66C98

The line needs to be changed to:
DisableHealth: p.BoolF(prefix+"request_log.disable_for_health", defaults.RequestLog.DisableHealth),

[wmolicki]

seems to be still the case