Add compatibility for data providers without named sets.

[TwoD]

When a data provider does not use named keys for the sets the method name will have a suffix in the form of "with data set #[Index] ([Arguments])".

The regexp didn't account for this, which in turn lead to a crash when testing for a class with a broken method name, leading to the test being excluded from Allure reports.

[CLAassistant]

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