[lldb/test] Skip `SBTarget::IsLoaded` test on windows (NFC)

This patch skips the test for the SBTarget::IsLoaded method on windows
since the logic is different.

Differential Revision: https://reviews.llvm.org/D95686

Signed-off-by: Med Ismail Bennani <medismail.bennani@gmail.com>
GitOrigin-RevId: ee562e2315cfe339fdcb0cb9b2122284bbeda29b
1 file changed