cmake XCTest examples

o3de/o3de Code/Tools/AzTestRunner/Platform/iOS/platform_ios.cmake :28 

find_package(XCTest REQUIRED)

wrld3d/wrld-example-app ios/CMakeLists.txt :224 

find_package(XCTest REQUIRED)

RavEngine/RavEngine deps/resonance-audio/third_party/ios-cmake/example/example-lib/CMakeLists.txt :26 

find_package(XCTest)

ossia/libossia cmake/OssiaConfiguration.cmake :45 

find_package(XCTest REQUIRED)

microsoft/onnxruntime-extensions cmake/ext_tests.cmake :20 

find_package(XCTest REQUIRED)