Adjust integration test to opt into cshtml extraction

Author: tamasvajk

csharp/ql/integration-tests/all-platforms/cshtml_standalone/test.py

@@ -1,3 +1,6 @@
+import os
 from create_database_utils import *
 
+
+os.environ['CODEQL_EXTRACTOR_CSHARP_STANDALONE_EXTRACT_WEB_VIEWS'] = 'true'
 run_codeql_database_create(lang="csharp", extra_args=["--extractor-option=buildless=true", "--extractor-option=cil=false"])