PYTHON-3716 Move OIDC test file (#1378)

Author: blink1073

.evergreen/run-tests.sh

@@ -224,7 +224,7 @@ fi
 
 if [ -n "$TEST_AUTH_OIDC" ]; then
     python -m pip install ".[aws]"
-    TEST_ARGS="test/auth_aws/test_auth_oidc.py"
+    TEST_ARGS="test/auth_oidc/test_auth_oidc.py"
 fi
 
 if [ -n "$PERF_TEST" ]; then