Fix ExceptionHandler handle() method as async for async telebot

[oalexandere]

issue #2070

Description

Class ExceptionHandler has sync method handle() which is not compatible with async telebot in some cases.

Describe your tests

How did you test your change?

export CHAT_ID='' GROUP_ID=''
cd tests
pytest

As a result:
2 failed, 106 passed, 2 skipped, 1 warning in 117.93s (0:01:57)

2 failed:

FAILED test_telebot.py::TestTeleBot::test_send_file_with_filename - telebot.apihelper.ApiTelegramException: A request to the Telegram API was unsuccessful. Error code: 400. Description: Bad Request: file must be non-empty
FAILED test_telebot.py::TestTeleBot::test_chat_commands - IndexError: list index out of range

Python version:
3.10

OS:
macOS 14.1

Checklist:

• I added/edited example on new feature/change (if exists)
• My changes won't break backward compatibility
• I made changes both for sync and async

[Badiboy]

Looks fine for me.

@coder2020official ?

[oalexandere]

Added same edits (method self._handle_exception) for sync telebot just for code sameness.

[coder2020official]

LGTM, thanks, and sorry for taking that long; @Badiboy u can merge if you agree