Add boundary_name for the method create_two_resistor_network_block of Icepak

### 📝 Description of the feature

Please add boundary_name for the method create_two_resistor_network_block of Icepak.

https://examples.aedt.docs.pyansys.com/version/dev/examples/electrothermal/components_csv.html

### 💡 Steps for implementing the feature

_No response_

### 🔗 Useful links and references

_No response_

Start from the create_two_resistor_network_block method used by the linked Icepak electrothermal example at examples.aedt.docs.pyansys.com/version/dev/examples/electrothermal/components_csv.html. Trace how the method creates the resistor network and how boundary names are handled nearby. Done means the method accepts and applies boundary_name in that example without breaking its existing behavior.

Written by the indexing model from the issue text.