[lldb][Windows] XFAIL TestExitDuringStep.py on ARM64 (#228392)

This is a follow up to https://github.com/llvm/llvm-project/pull/227318
which re-enabled `TestExitDuringStep.py` on Windows.

Those tests still fail on ARM64 Windows (see
https://github.com/llvm/llvm-project/pull/228391). XFAIL them for now.

GitOrigin-RevId: ba680de5049dbd0238d9e023ac60fcdf1e09fb48
1 file changed