[tidy_first] Set default for STATE_MODIFIED_COMPARE_VARS flag, mark TestProjInfo as not a test class (#10805)

Author: aranke

core/dbt/cli/flags.py

@@ -37,6 +37,7 @@
     "STRICT_MODE": False,
     "STORE_FAILURES": False,
     "INTROSPECT": True,
+    "STATE_MODIFIED_COMPARE_VARS": False,
 }
 
 DEPRECATED_PARAMS = {

core/dbt/tests/fixtures/project.py

@@ -428,6 +428,8 @@ def test_config():
 # from the pytest fixtures that may be needed in the test functions, including
 # a 'run_sql' method.
 class TestProjInfo:
+    __test__ = False
+
     def __init__(
         self,
         project_root,