Update python scripts in Orion

[ArqamFarooqui110719]

Bug description
While using the entity delete script, I have observed that multiple other python scripts are old and written in python2, these scripts should be upgraded to python3.

List of scripts that need to be upgraded

1. fiware-orion/scripts/notification_errors_tester.py
2. fiware-orion/scripts/utils/check_entity_existence_by_list.py
3. fiware-orion/scripts/utils/get_coordinates.py
4. fiware-orion/scripts/utils/sth_periodic_update.py

Orion version: 3.11.x

How to reproduce it
Run the script

python3 script_name

Expected behavior
Script should run successfully.

[ArqamFarooqui110719]

I'm working on upgrading the above mentioned scripts, will raise a PR for the above listed scripts.

[ArqamFarooqui110719]

PR #4516