Implement universal presets

[PaulRalnikov]

Currently topology parser supports presets only for links. Needs to add support for all types of objects. Supposed plan:

1. Change API & realization of objects parsers: currently most of them takes one ConfigNode (maybe with some additional info) that they should parse into concrete object. In new implementation parsers should take two nodes: main node and preset node (last one should be used if some field is missing in main node). Also it might be useful to wrap preset node with std::optional
2. Replace old way of link presets with new one
3. Add preset for flows in simulation configs