update googletest from 1.8 to 1.14, and rm Python from CMake

pub/3rdparty/gtest/CMakeLists.txt

pub/3rdparty/gtest/googletest-1.14.0/.clang-format

...oogletest-1.14.0/.github/ISSUE_TEMPLATE/00-bug_report.yml

...test-1.14.0/.github/ISSUE_TEMPLATE/10-feature_request.yml

...gtest/googletest-1.14.0/.github/ISSUE_TEMPLATE/config.yml

...ty/gtest/googletest-1.14.0/.github/workflows/gtest-ci.yml

pub/3rdparty/gtest/googletest-1.14.0/.gitignore

pub/3rdparty/gtest/googletest-1.14.0/BUILD.bazel

pub/3rdparty/gtest/googletest-1.14.0/CMakeLists.txt

pub/3rdparty/gtest/googletest-1.14.0/CONTRIBUTING.md

pub/3rdparty/gtest/googletest-1.14.0/CONTRIBUTORS

pub/3rdparty/gtest/googletest-1.14.0/LICENSE

pub/3rdparty/gtest/googletest-1.14.0/README.md

pub/3rdparty/gtest/googletest-1.14.0/WORKSPACE

pub/3rdparty/gtest/googletest-1.14.0/ci/linux-presubmit.sh

pub/3rdparty/gtest/googletest-1.14.0/ci/macos-presubmit.sh

...3rdparty/gtest/googletest-1.14.0/ci/windows-presubmit.bat

pub/3rdparty/gtest/googletest-1.14.0/docs/_config.yml

...rdparty/gtest/googletest-1.14.0/docs/_data/navigation.yml

...dparty/gtest/googletest-1.14.0/docs/_layouts/default.html