COMP: Streamline client project integration by explicitly including "vector"

[jcfr]

This commit fixes regression introduced in b99fa7324 (Add several functions to the render window) allowing client project to successfully build without having to include "vector" header.

[aylward]

Re-running failed test (Linux wheels).

[jcfr]

Error is the following:

        CMake Error at /tmp/pip-build-env-w1ajn9iv/overlay/lib/python3.7/site-packages/cmake/data/share/cmake-3.24/Modules/FindPackageHandleStandardArgs.cmake:230 (message):
          Could NOT find Python3 (missing: Python3_INCLUDE_DIRS Development.Module)
          (found suitable version "3.7.15", minimum required is "3.7")
        Call Stack (most recent call first):
          /tmp/pip-build-env-w1ajn9iv/overlay/lib/python3.7/site-packages/cmake/data/share/cmake-3.24/Modules/FindPackageHandleStandardArgs.cmake:594 (_FPHSA_FAILURE_MESSAGE)
          /tmp/pip-build-env-w1ajn9iv/overlay/lib/python3.7/site-packages/cmake/data/share/cmake-3.24/Modules/FindPython/Support.cmake:3203 (find_package_handle_standard_args)
          /tmp/pip-build-env-w1ajn9iv/overlay/lib/python3.7/site-packages/cmake/data/share/cmake-3.24/Modules/FindPython3.cmake:490 (include)
          /vtk-wheel-sdk/vtk-9.2.2.data/headers/cmake/VTK-vtk-module-find-packages.cmake:444 (find_package)
          /vtk-wheel-sdk/vtk-9.2.2.data/headers/cmake/vtk-config.cmake:152 (include)
          CMakeLists.txt:29 (find_package)
        
        
        -- Configuring incomplete, errors occurred!
        See also "/project/_skbuild/linux-x86_64-3.7/cmake-build/CMakeFiles/CMakeOutput.log".
        See also "/project/_skbuild/linux-x86_64-3.7/cmake-build/CMakeFiles/CMakeError.log".
        /tmp/pip-build-env-w1ajn9iv/overlay/lib/python3.7/site-packages/setuptools_scm/git.py:135: UserWarning: "/project" is shallow and may cause errors
          warnings.warn(f'"{wd.path}" is shallow and may cause errors')
        Traceback (most recent call last):
          File "/tmp/pip-build-env-w1ajn9iv/overlay/lib/python3.7/site-packages/skbuild/setuptools_wrap.py", line 637, in setup
            languages=cmake_languages,
          File "/tmp/pip-build-env-w1ajn9iv/overlay/lib/python3.7/site-packages/skbuild/cmaker.py", line 334, in configure
            "An error occurred while configuring with CMake.\n"

Source: https://github.com/Kitware/LookingGlassVTKModule/actions/runs/3366862318/jobs/5594079792

[jcfr]

Since I am working on enabling VTK wheel build for another project, I will investigate and report back.

[psavery]

I re-ran the workflow on master and encountered the same error, so it must be due to some change that's happened recently in the CI build process (a dependency, a change to the docker image, etc.).