refactor: Update telegram filters import and usage syntax

[ckaytev]

What this PR does

Fix syntax for python-telegram-bot imports after upgrade to 20.0+ version

See release notes for python-telegram-bot 20.0

2. Removed the Filters class. The filters are now directly attributes/classes of the filters module.
3. The names of all filters has been updated:

• Filter classes which are ready for use, e.g Filters.all are now capitalized, e.g filters.ALL.

• Filters which need to be initialized are now in CamelCase. E.g. filters.User(...).

• Filters which do both (like Filters.text) are now split as ready-to-use version filters.TEXT and class version filters.Text(...).

Without this change, the logs of the telegram‑polling container show the following error:

ImportError: cannot import name 'Filters' from 'telegram.ext' (/usr/local/lib/python3.12/site-packages/telegram/ext/__init__.py). Did you mean: 'filters'?

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[matiasb]

Thanks!