refactor(tsp-apt): remove gwe-specific code from apt and distribute to advanced gwe packages

[emorway-usgs]

The variables ktf, thermal conductivity of the of the interface between the aquifer cell and the apt feature, for example a stream reach, and rfeatthk, a real value that defines the thickness of the streambed material through which conduction occurs, are specific to GWE and shouldn't have been added to APT in the first place. This PR removes both variables from APT and distributes them to SFE, LKE, and MWE where they are needed. Three pre-existing GWE autotests were already in place to help ensure that the changes didn't break anything (test_gwe_sfe_strmbedcond.py, test_gwe_lke_conduction.py, and test_gwe_mwe_conduction.py).

• Replaced section above with description of pull request
• Relates to PR feat(GWE): Introduce Groundwater Energy Transport #1493
• Formatted new and modified Fortran source files with fprettify
• Fixed a typo in the SFE And LKE definition files

[langevin-usgs]

Nice work getting these variables out of the tsp model. Perhaps at some point we can come up with a way to remove all this duplicate code, but for now I think this is good. I had one comment about the term "interface". Wonder if we need a better term for this as there should be a thickness to this interface that we might want to mention somewhere.