Update googletest submodule dependency to enable cmake to build tests

[dwiddows]

Update to google/googletest at v1.17.x, used at pytorch/third_party at main · pytorch/pytorch

Fixes the following error when trying to build tests:

CMake Error at third_party/googletest/CMakeLists.txt:4 (cmake_minimum_required) ...

The problem was that the googletest dependency was older than the project's minimum cmake version. So some version declaration needed to be changed to make tests build.

Please feel free to suggest alternative guidance if there's a better way to get tests running again.
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