[BUGFIX] Track FLORIS v4 changes

[misi9170]

PR 870 on FLORIS will release FLORIS v4, which bring significant changes to the FLORIS API that must be mapped over to FLASC. This PR tracks those changes by:

• reconfiguring the user-level API from a paradigm of calling reinitialize() followed by calculate_wake() to one of calling set() then run().
• Changing from FlorisInterface to FlorisModel, and fi to fm, throughout.
• Aligning with new expected usage of set() and starts to use wind_data objects.

Checklist:

• tests run
• examples run
• checks pass

Note that this PR does not make a significant effort to utilize new features in FLORIS v4. These will need to be incorporated in a follow-up PR. These changes may include:

• using FLORIS's visualizations and deleting FLASC's Use FLORIS tools for layout visualizations #181
• using FLORIS's merge fmodels Use FLORIS's methods for merging fmodels and setting model parameters #182
• using FLORIS's setting wake parameters Use FLORIS's methods for merging fmodels and setting model parameters #182
• using wind data objects thoughout.