[SYCL][E2E][LIT] Fix processing of boolean parameters (#18893)

They're read as strings, not booleans. Need to be processed as such.

Author: aelovikov-intel

sycl/test-e2e/lit.cfg.py

@@ -382,7 +382,7 @@ def open_check_file(file_name):
     else:
         config.substitutions.append(("%level_zero_options", ""))
 
-if lit_config.params.get("test-preview-mode", False):
+if lit_config.params.get("test-preview-mode", "False") != "False":
     config.available_features.add("preview-mode")
 else:
     # Check for sycl-preview library
@@ -1086,7 +1086,7 @@ def get_sycl_ls_verbose(sycl_device, env):
     else:
         config.intel_driver_ver[full_name] = {}
 
-if lit_config.params.get("compatibility_testing", False):
+if lit_config.params.get("compatibility_testing", "False") != "False":
     config.substitutions.append(("%clangxx", " true "))
     config.substitutions.append(("%clang", " true "))
 else: