SNOW-2306184: config refactor - old & new unit tests

Author: sfc-gh-mraba

tests_integration/conftest.py

@@ -120,6 +120,12 @@ def invoke(self, *a, **kw):
             kw.update(catch_exceptions=False)
         kw = self._with_env_vars(kw)
 
+        # Reset config provider to ensure fresh config resolution
+        # This is critical for tests that set environment variables
+        from snowflake.cli.api.config_provider import reset_config_provider
+
+        reset_config_provider()
+
         # between every invocation, we need to reset the CLI context
         # and ensure no connections are cached going forward (to prevent
         # test cases from impacting each other / align with CLI usage)