`driver.find_elements()` should be able to accept a single arg with default `by="css selector"`

[mdmintz]

driver.find_elements() should be able to accept a single arg with default by="css selector"

Currently, the by is required. Having sensible default values helps simplify things.

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This continues the improvements made in #2122, which was for driver.find_element().

[mdmintz]

This was resolved in 4.18.9 - https://github.com/seleniumbase/SeleniumBase/releases/tag/v4.18.9