Add new rule to check for context=None in FTP_TLS

[ericwb]

Is your feature request related to a problem? Please describe. The default behavior of the FTP_TLS class is to use ssl._create_unverified_context if the context parameter is None. Therefore, a proper context should always be passed.

Describe the solution you'd like Add rule to detect FTP_TLS if context is None.

Suggest fix to use ssl.create_default_context

Describe alternatives you've considered n/a

Additional context

• https://docs.python.org/3/library/ftplib.html#ftplib.FTP_TLS
• https://docs.python.org/3/library/ssl.html#best-defaults
• https://github.com/python/cpython/blob/3.12/Lib/ftplib.py#L715
• https://github.com/python/cpython/blob/3.12/Lib/ssl.py#L780

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