Output only text and move VTK to a post-processor

[mrp089]

Problem

We can currently choose between text and VTK output. VTK output creates a visualization of tubes in 3D space that deform over time with arrays for pressure and flow rate. This visualization is nice but requires the user to choose the preferred post-processing method before running the simulation. Thus, there is only output possible, and it has to be known a priori. Furthermore, the input node*coord is currently mandatory but only required for VTK post-processing.

Solution

Remove VTK output from the solver and move it to a post-processor that can visualize text output in VTK.

Additional context

No response

Code of Conduct

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[arsLibera]

When moving the VTK output it would be worthwhile to also upgrade the algorithm to account for spatially varying areas within segments. That's assuming that work is complete. It's being added as part of #123

In the current state of that work, the VTK postprocess algorithm in cvOneDBFSolver has not been upgraded to utilize the spatially varying areas within segments. Instead, it continues to use the legacy behavior -- only calculating the areas of the segments based on the inlet/outlet areas.

I've added TODO notes inside cvOneDBFSolver where the spatially varying areas should be utilized.