update internal gtest to v1.17.0

[TinyTinni]

Problem is, when trying to build kompute with cmake >=4 and building the tests. (-DKOMPUTE_OPT_BUILD_TESTS=ON)
The CMake configuration will fail. Similar to #422

CMake Error at build/_deps/googletest-src/CMakeLists.txt:4 (cmake_minimum_required):
  Compatibility with CMake < 3.5 has been removed from CMake.

  Update the VERSION argument <min> value.  Or, use the <min>...<max> syntax
  to tell CMake that the project requires at least <min> but has been updated
  to work with policies introduced by <max> or earlier.

  Or, add -DCMAKE_POLICY_VERSION_MINIMUM=3.5 to try configuring anyway.

Instead of workarounds, like setting KOMPUTE_OPT_USE_BUILT_IN_GOOGLE_TEST=OFF or CMAKE_POLICY_VERSION_MINIMUM=3.5, it would probably best to just update the dependency. The PR adds the currently most recent version of gtest.

[axsaucedo]

Thank you!