Fix the pytorch_lightning env vars vulnerability

[samet-akcay]

Describe the bug
the current version of pytorch_lightning library has vulnerability to code injection – code read from environment variables started with PL_ could be evaluated.

See the function parse_env_variables in the file pytorch_lightning/utilities/argparse.py and the decorator _defaults_from_env_vars from the file pytorch_lightning/trainer/connectors/env_vars_connector.py in pytorch lightning library source code.

Our proposal: to fix this vulnerability we should do as follows:

1. create a python file remove_pl_parameters_tweaking.py in anomalib with the following code:

import os
   for pl_env in [env_name for env_name in os.environ if env_name.upper.startswith("PL_")]:
        os.environ.del(pl_env)