[CONFORMANCE] Fix error with import sigkill (#16884)

src/tests/ie_test_utils/functional_test_utils/layer_tests_summary/run_parallel.py

@@ -9,7 +9,9 @@ from subprocess import Popen, STDOUT, TimeoutExpired, run, call
 from hashlib import sha256
 from pathlib import Path
 from shutil import rmtree
-from signal import SIGKILL
+
+if not constants.IS_WIN:
+    from signal import SIGKILL
 
 import os
 import sys