Energy mortar cleanup

[ebchin]

• Removed .clangd as it was build specific
• Clean up coupling scheme and mfem_tribol logic
• Clean up tests (single registration of coupling scheme instead of per-timestep, remove formulation_ready in tribol_energy_mortar_patch_LM). Needed a method to update penalty parameters in ContactFormulation to support this.
• Add a getMfemJacobian() method to return a single mfem::HypreParMatrix (no blocks) for penalty methods

[srwopschall]

@ebchin - We discussed most everything I wanted to discuss. The rest of the comments are self-explanatory in terms of what might need to be modified.

[srwopschall]

Resolve the getMfemJacobian() vs. getMfemDfDx() comments.