[Intel] Move UTs to third_party/intel (#3104)

Similar to AMD, this PR moves unit tests added downstream only to
`third_party/intel`.

Signed-off-by: Whitney Tsang <[email protected]>

Author: whitneywhtsang

scripts/test-triton.sh

@@ -203,6 +203,10 @@ run_core_tests() {
 
   TRITON_DISABLE_LINE_INFO=1 TRITON_TEST_SUITE=tools \
     pytest --verbose tools/
+
+  cd $TRITON_PROJ/third_party/intel/python/test
+  TRITON_DISABLE_LINE_INFO=1 TRITON_TEST_SUITE=third_party \
+  pytest --device xpu .
 }
 
 run_regression_tests() {

third_party/intel/python/test/conftest.py

@@ -0,0 +1,26 @@
+import os
+import pytest
+import tempfile
+
+
+def pytest_addoption(parser):
+    parser.addoption("--device", action="store", default="cuda")
+
+
+@pytest.fixture
+def device(request):
+    return request.config.getoption("--device")
+
+
+@pytest.fixture
+def fresh_triton_cache():
+    try:
+        with tempfile.TemporaryDirectory() as tmpdir:
+            try:
+                os.environ["TRITON_CACHE_DIR"] = tmpdir
+                yield tmpdir
+            finally:
+                os.environ.pop("TRITON_CACHE_DIR", None)
+    except OSError:
+        # Ignore errors, such as PermissionError, on Windows
+        pass