D005 OMCSession - classes update (#435)

* (D004) define OMSessionRunner

[(_)OMPathRunnerLocal] improve definition

* fix return values
* additional cleanups

[__init__] define OMPathRunnerLocal for public interface

[_OMPathRunnerBash] define class

[__init__] define OMPathRunnerBash for public interface

[OMSessionRunner] update code such that it can be used by OMPathRunnerLocal and OMPathRunner Bash

* (D005) update classes in OMCSession

[OMCSessionPort] fix timeout handling

[OMCSessionDocker*] improve data handling

* move more code to OMCSessionDockerHelper
* use _docker_omc_start() to differentiate classes
* define cmd_prefix

[OMCSessionWSL] define cmd_prefix

[OMCSessionWSL] layout fix

* fix docstrings; replace old OMCPathDummy by OM*Path* to indicate it will work for any of these classe

* update timeout hadnling - define default value only once

* definition in OMSessionABC
* move `set_timeout()` to this class
* all other places use `timeout: Optional[float] = None`

* add log message on timeout change

Author: syntron