Support VTK 9.x

[fcooper8472]

See #36

This approach creates a CMake interface library with no source files which our dependencies are linked against.

This interface library is then linked against chaste libraries and executables.

This allows us to use the modern target_link_libraries method of ingesting dependencies, whereas we had previously been relying on populating lists of libraries and include directories, which is a much older CMake pattern.

VTK 9 is the first dependency that is no longer compatible with this old way of doing things, but part of the work on modernising our CMake infrastructure will be to migrate all our dependencies over to this new way of doing things.

[codecov]

Codecov Report

Merging #152 (8a80064) into develop (b7ee62a) will not change coverage.
The diff coverage is 100.00%.

@@            Coverage Diff            @@
##           develop      #152   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files          980       980           
  Lines        47842     47843    +1     
=========================================
+ Hits         47842     47843    +1     

Files Changed	Coverage Δ
mesh/src/reader/VtkMeshReader.cpp	100.00% <100.00%> (ø)

[jmpf]

Changes look good.

Also tested on 22.04 (Jammy) with stock VTK 7.1.1 (vtk7-dev).
Had problems installing vtk9-dev without breaking multiple parts of my current Chaste development environment, but that's okay because CLI show it works on a fresh install.