UnicodeDecodeError: unexpected end of data in on_tracker_error_alert

[kozlovsky]

Here:

    def on_tracker_error_alert(self, alert: lt.tracker_error_alert):
        self._logger.error(f'On tracker error alert: {alert}')  # <-- here

        # try-except block here is a workaround and has been added to solve
        # the issue: "UnicodeDecodeError: invalid continuation byte"
        try:
            ...

It is a regression of #5740: f-string formatting of the logging.error output should also be placed inside the following try/except block to have protection from UnicodeDecodeError.

As an additional protection, we can add a helper function like alert_to_str and use it in all places where we have {alert} formatting to be sure that all alerts can be safely converted to str

[sentry-for-tribler]

Sentry issue: TRIBLER-16C