Duplicate rotate for conntrackd-stats

Both files /etc/logrotate.d/conntrackd and /etc/logrotate.d/conntrackd.distrib contain the config to rotate /var/log/conntrackd-stats.log.

This causes logrotate to fail.

Running build: VyOS 1.4-rolling-202210090955 (current)

That stray /etc/logrotate.d/conntrackd.distrib file is still there in:

Version:          VyOS 1.4-rolling-202210180800
Release train:    current

Built by:         autobuild@vyos.net
Built on:         Tue 18 Oct 2022 08:00 UTC
Build UUID:       175b7cd2-e2c7-4b25-8c61-7266ab71349b
Build commit ID:  b7ec609c3ccacb