REFAC: Interactor style and keyboard control refactor to fix dependencies, continued library reorganization

Upgrade to VTK 9.1

See merge request iMSTK/iMSTK!739

Improve build system to streamline application integration

See merge request iMSTK/iMSTK!702

The application of "vtk-8.2.cmake" patch was obsoleted by commit
f796986e (REFAC: VTK 9 and greater dependence, task graph timing
chart disabled, data replacements, example updates)

Consistently using "mark_as_superbuild" along side the declaration
of the associated option or cache entry facilitates maintenance by
helping ensure value are consistently passed to the inner build.

For example, it fixes the passing of these two options:

* iMSTK_ENABLE_CUDA_BACKEND: Introduced in 5e90bbce (ENH: Enable CUDA
  in CMake configuration)

* iMSTK_SWIG_PINNED_ARRAY: Introduced in c2b5429e (ENH: add pinned array;
  add cmake option to choose between marshal array and pinned array)

Unless option have to be passed using the command line, this is the
recommended approach to pass options. It avoids "command line length issues".

This commit sets the cache variable prior configuring the outer
build (SUPERBUILD=ON) and it makes sure it is also propagated
down to the inner project.

This commit sets the cache variable prior configuring the outer
build (SUPERBUILD=ON) and it makes sure it is also propagated
down to the inner project.

The variable is currently used only in Wrappers project and was originally
introduced in 6acfa41f (COMP: Build audio only on windows).

This commit is a follow up of 35940011 (ENH: Update imstkSolveDependencies
module based on commontk/Artichoke@4176c39f9) where the variable should
have been originally removed.

Reports messages like the following when OPENHAPTICS_ROOT_DIR is not defined
and is being initialized based on the OH_SDK_BASE environment variable:

  [...]
  -- Checking if OH_SDK_BASE env. variable is defined
  -- Checking if OH_SDK_BASE env. variable is defined - TRUE
  -- Checking if OH_SDK_BASE env. variable is set to existing path
  -- Checking if OH_SDK_BASE env. variable is set to existing path - TRUE
  -- Setting OPENHAPTICS_ROOT_DIR to C:/OpenHaptics/Developer/3.4.0
  -- SuperBuild - First pass - done
  [...]