Move conftest log initialization to conftest.py

Initializing the conftest logging upon importing the isctest package
isn't practical when there are standalone pieces which can be used
outside of the testing framework, such as the asyncdnsserver module.

(cherry picked from commit 673387c4d5)

bin/tests/system/conftest.py

@@ -33,6 +33,9 @@ import isctest
 if sys.version_info[1] < 10:
     raise RuntimeError("Python 3.10 or newer is required to run system tests.")
 
+isctest.log.init_conftest_logger()
+isctest.log.avoid_duplicated_logs()
+
 # ----------------------- Globals definition -----------------------------
 
 XDIST_WORKER = os.environ.get("PYTEST_XDIST_WORKER", "")

bin/tests/system/isctest/log/__init__.py

@@ -10,8 +10,10 @@
 # information regarding copyright ownership.
 
 from .basic import (
+    avoid_duplicated_logs,
     deinit_module_logger,
     deinit_test_logger,
+    init_conftest_logger,
     init_module_logger,
     init_test_logger,
     debug,

bin/tests/system/isctest/log/basic.py

@@ -54,10 +54,6 @@ def avoid_duplicated_logs():
         logging.root.handlers.remove(handler)
 
 
-init_conftest_logger()
-avoid_duplicated_logs()
-
-
 def init_module_logger(system_test_name: str, testdir: Path):
     logger = logging.getLogger(system_test_name)
     logger.handlers.clear()