Feat: Add a deprecated decorator for any function and use it on the unused functions

[gmuloc]

In python 3.13 it will be built-in

• https://peps.python.org/pep-0702/
• https://github.com/python/cpython/blob/main/Lib/warnings.py

#740 is removing the usage of some functions and to be backward compatible we will keep them in until ANTA 2.0.0

in anta.result_manager.__init__.py these are not needed anymore

• filter_by_tests
• filter_by_devices
• get_tests
• get_devices

#802 AntaCatalog.merge() method is deprecated in favor of merge_catalogs().