FindPackageTest: Replace VTK with Boost

Frank Danarequested to merge
ferdnyc/cmake:test-find-boost into master

Replace the use of find_package(VTK) with a call to find_package(Boost), CMake's most complex Find module (based on number of source lines, 2588 in the version included with CMake 3.22.2). (See #23934 (closed) for details on why find_package(VTK) is no longer a good test.)

Fixes #23934 (closed)

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