Add log_format and log_date_format to pytest.ini for improved logging configuration (sonic-net#19965)

Currently we have logging logs attached to allure report but these logs do not
have date and time information and it makes debugging difficult when we
need to align the date and time logs from allure with other logs.

This change is to add customized format for the log messages that will
be attached to allure report

Author: xixuej

tests/pytest.ini

@@ -51,3 +51,5 @@ markers:
 log_cli_format: %(asctime)s %(funcNamewithModule)-40.40s L%(lineno)-.4d %(levelname)-7s| %(message)s
 log_file_format: %(asctime)s %(funcNamewithModule)-40.40s L%(lineno)-.4d %(levelname)-7s| %(message)s
 log_file_date_format: %d/%m/%Y %H:%M:%S
+log_format: %(asctime)s %(funcNamewithModule)-40.40s L%(lineno)-.4d %(levelname)-7s| %(message)s
+log_date_format: %d/%m/%Y %H:%M:%S