Tests: Teach RunCMake to ignore Xcode an IDERunDestination warning

On some Xcode versions, `xcodebuild` may warn:

    ... xcodebuild[...] IDERunDestination: ...

Teach RunCMake to drop such incidental lines before matching against
expected output.

Backport commit edaa6ed06a (Tests: Teach RunCMake to ignore Xcode an
IDERunDestination warning, 2025-09-19, v4.1.2~9^2~1) to CMake 3.31.