Tests on nbextensions are broken with latest selenium version (4.3.0)

[brichet]

The latest version of selenium 4.3.0 breaks the nbextensions tests with the following error : E AttributeError: 'WebDriver' object has no attribute 'find_elements_by_css_selector'

This has been fixed in main branch in https://github.com/jupyter/nbgrader/pull/1611 by pinning selenium < 4.3, as the main branch is no longer supposed to support nbextensions.

This issue should be fixed in the branch 0.7.x.

[jtpio]

This seems to be related to the removal of previously deprecated methods:

• Deprecated find_element_by_* and find_elements_by_* are now removed (#10712)

https://github.com/SeleniumHQ/selenium/blob/2fbfc62f565026ba57cf700e14179012c6ebef4c/py/CHANGES#L2

Probably we can remove the pin and update the code to the new API as mentioned in the docstring:

Please use find_element(by=By.CSS_SELECTOR, value=css_selector) instead",

[brichet]

Fixed in https://github.com/jupyter/nbgrader/pull/1677