replace pytest-timeout with SIGABRT hook (#17122)

conftest.py

@@ -0,0 +1,10 @@
+import os, pytest, signal, threading
+
+@pytest.hookimpl(wrapper=True)
+def pytest_runtest_call(item):
+  t = threading.Timer(int(os.getenv("TEST_TIMEOUT", 300)), os.kill, args=(os.getpid(), signal.SIGABRT))
+  t.start()
+  try: yield
+  finally:
+    t.cancel()
+    t.join()

pyproject.toml

@@ -74,7 +74,6 @@ testing_minimal = [
   "torch==2.9.1",
   "pytest",
   "pytest-xdist",
-  "pytest-timeout",
   "pytest-split",
   "hypothesis>=6.148.9",
   "z3-solver<4.15.4",  # 4.15.4 has a segfault when creating many z3.Context()
@@ -160,8 +159,6 @@ norecursedirs = [
   ".hypothesis",
   ".git",
 ]
-timeout = 300
-timeout_func_only = true
 testpaths = ["test"]
 filterwarnings = [
   # Ignore SWIG warnings from importlib