qt6-bb10/tests/auto/cmake/RunCMake

RunCMake tests

These test suites use upstream CMake's RunCMake test module. See the upstream documentation on how to add tests.

A few minor adjustments we make:

• add_RunCMake_test() function is defined in QtRunCMakeTestHelpers module instead of the CMakeLists.txt
• CMAKE_CMAKE_COMMAND is replaced with CMAKE_COMMAND
• CMAKE_MODULE_PATH points to CMAKE_CURRENT_LIST_DIR (indirectly via variable RunCMakeDir) instead of CMAKE_CURRENT_SOURCE_DIR

Update /cmake/3rdparty/cmake as needed. Last fetched from v3.31.5.