Use single var to enable both adapters

Author: igchor

sycl/test-e2e/format.py

@@ -333,6 +333,8 @@ def get_extra_env(sycl_devices):
                 dev_features = test.config.sycl_dev_features[full_dev_name]
                 if "level_zero_v2_adapter" in dev_features:
                     expanded += " env UR_LOADER_USE_LEVEL_ZERO_V2=1"
+                else:
+                    expanded += " env UR_LOADER_USE_LEVEL_ZERO_V2=0"
 
                 expanded += " ONEAPI_DEVICE_SELECTOR={} {}".format(
                     parsed_dev_name, test.config.run_launcher

sycl/test-e2e/lit.cfg.py

@@ -962,6 +962,8 @@ def get_sycl_ls_verbose(sycl_device, env):
 
     if "v2" in full_name:
         env["UR_LOADER_ENABLE_LEVEL_ZERO_V2"] = "1"
+    else:
+        env["UR_LOADER_ENABLE_LEVEL_ZERO_V2"] = "0"
 
     env["ONEAPI_DEVICE_SELECTOR"] = sycl_device
     if sycl_device.startswith("cuda:"):