Consider Turn Restrictions in Network Cleaner

[paulheinr]

Here is the explanation of the current implementation of turn restrictions: https://github.com/matsim-org/matsim-code-examples/wiki/turn-restrictions

Current Behaviour: The network cleaner performs a simple Dijkstra search for finding non-reachable nodes & links. It does not consider turn restrictions.

Desired Behaviour: There are two options:

1. Consider turn restrictions during search and clean network equivalent to current implementation
2. Remove turn restrictions to make links & nodes reachable

I am in favor of 1.

[paulheinr]

This issue was also mentioned in #2829.