switch to named pipes for testing communication

[eleanorjboyd]

Right now all the ports used for tests are just numbered ports. These should be switched to named ports. There are two ports, the one that receives data and the one that sends test ids during run.

[eleanorjboyd]

#22170, is waiting on this issue as the changes to named pipes in the environment variables will change the values we are testing

[eleanorjboyd]

#20662, will be resolved as well with this issue and switching to pipes removed the use of the server class in total.