Check timing config

Closes ICSHWI-20815

See merge request !44

This is an initial attempt to make FENBase and RMMAPI a little more
independent of one another: the addresses maps now belong to the FEN,
meaning two advantages:

  1 - Reduced code complexity: getInternalRegAddres only needs to
      access this->regMap instead of asking for the API with:
      const std::unordered_map<std::string, uint32_t>& regMap = rmmAPI->getTopology().getAddrMap(this->ring, this->node);

  2 - It's should now be possible to use userRegRead in the FEN
      constructor, because it no more depends on the topology object
      being populated with it. It also lets topology only worry
      about the physical topology, instead of having to store the
      regMaps from the FENs, which are now stored in the actual FENs.

This is based simply on a personal opinion about the code design, and
not in any particular need. So it's not important for anyone but it
makes the grumpy gnome that lives in my head less grumpy.

Decouple FEN regMap from topology

See merge request !50

To make register maps come directly from classes that inherit from
FrontEndBase.

Remove regMap as FrontEndFactory argument

See merge request !51