add_test: CROSSCOMPILING_EMULATOR is used even CMAKE_CROSSCOMPILING is off
## Steps to reproduce
- Host OS: Windows 10
- CMake: 3.23.2
```cmake
cmake_minimum_required(VERSION 3.23)
project(CMakeTest)
if(CMAKE_CROSSCOMPILING)
message(FATAL_ERROR "cross compiling")
endif()
add_executable(app main.cpp)
enable_testing()
add_test(NAME App COMMAND app)
```
Configure with `-DCMAKE_CROSSCOMPILING_EMULATOR=no-such-cmd` and then run `ctest`:
```
Unable to find executable: no-such-cmd
1/1 Test #1: App ..............................***Not Run 0.00 sec
```
## References
- https://cmake.org/cmake/help/v3.23/variable/CMAKE_CROSSCOMPILING_EMULATOR.html
- https://cmake.org/cmake/help/v3.23/prop_tgt/CROSSCOMPILING_EMULATOR.html#prop_tgt:CROSSCOMPILING_EMULATOR
issue