MELDThermal Coordinate Derivatives

[sean-engelstad]

• Add coordinate derivatives for aero and structural disciplines to the MeldThermal class
• Should just involve differentiating the weight matrix involved in the T and Q residuals w.r.t. xa0 and xs0
• Will have to add to MeldThermal.cpp, TransferScheme.pxd, TransferScheme.pyx, and the body.py file
• Discovered these features are missing because the aerothermal coordinate derivatives in my coordinate derivatives unittest for the TacsOnewayDriver were off by 100%. Aerothermoelastic was very off too

[sean-engelstad]

Apparently we didn't use to need them. However, now with number of aero nodes and struct nodes changing the weight matrix for thermal transfer will change when integrated with ESP/CAPS shape optimization. Therefore we need these coordinate derivatives now

[sean-engelstad]

We fix the aerodynamic + structural coordinates for the thermal transfer scheme. This may cause remeshing shape derivatives to be less accurate. However, that is why we need structural mesh morphing. Closing this issue for now