Turn rpcauth.py test into functional test

cmake/tests.cmake

@@ -1,10 +0,0 @@
-# Copyright (c) 2023-present The Bitcoin Core developers
-# Distributed under the MIT software license, see the accompanying
-# file COPYING or https://opensource.org/license/mit/.
-
-add_test(NAME util_rpcauth_test
-  COMMAND Python3::Interpreter ${PROJECT_BINARY_DIR}/test/util/rpcauth-test.py
-)
-set_tests_properties(util_rpcauth_test PROPERTIES
-  DISABLED $<NOT:$<TARGET_EXISTS:Python3::Interpreter>>
-)