[Windows] Fix level_zero/ze_api.h not found when running UT by using LEVEL_ZERO_V1_SDK_PATH env var (#3656)

@pbchekin @vlad-penkin I took all the artifacts after using (on local
machine) the sdk installer (all options by default), packed the folder
into a tar archive and changed the name of the environment variable. It
seems that this is all that is needed for integration.

**UPD**: although `ZE_PATH` is not a standard and documented variable in
level_zero (at least I haven't found it), it was decided to leave it in
so as not to break the code of users who might use it. Interestingly, I
haven't found any use of it in the PyTorch code.

---------

Signed-off-by: Anatoly Myachev <[email protected]>
(cherry picked from commit 9304351)

Author: anmyachev

.github/workflows/build-test-windows.yml

@@ -22,7 +22,6 @@ permissions: read-all
 env:
   PYTHONIOENCODING: utf-8
   NEW_WORKSPACE: C:\gh${{ github.run_id }}
-  ZE_PATH: C:\level_zero
   SKIPLIST: --skip-list scripts/skiplist/${{ inputs.skip_list }}
   TRITON_TEST_CMD: bash -x scripts/test-triton.sh --skip-pytorch-install --skip-pip-install --skip-list scripts/skiplist/${{ inputs.skip_list }} --reports-dir reports --ignore-errors
 

.github/workflows/pip-test-windows.yml

@@ -34,7 +34,6 @@ permissions: read-all
 env:
   PYTHONIOENCODING: utf-8
   NEW_WORKSPACE: C:\gh${{ github.run_id }}
-  ZE_PATH: C:\level_zero
   PYTEST_MAX_PROCESSES: 8
   SKIPLIST: --skip-list scripts/skiplist/${{ inputs.skip_list || 'a770' }}
   TRITON_TEST_CMD: bash -x scripts/test-triton.sh --skip-pytorch-install --skip-pip-install --skip-list scripts/skiplist/${{ inputs.skip_list || 'a770' }} --reports-dir reports --ignore-errors

third_party/intel/backend/driver.py

@@ -100,7 +100,9 @@ def inject_pytorch_dep(self):
 
     @cached_property
     def _compute_compilation_options_lazy(self):
-        ze_root = os.getenv("ZE_PATH", default="/usr/local")
+        ze_root = os.getenv("LEVEL_ZERO_V1_SDK_PATH")
+        if ze_root is None:
+            ze_root = os.getenv("ZE_PATH", default="/usr/local")
         include_dir = [os.path.join(ze_root, "include")]
 
         library_dir = []