Allow LuxInputSelect to use Capybara "select" method

[maxkadel]

What maintenance needs to be done?

Update the LuxInputSelect so that Capybara's "select" method works on it.

Level of urgency

• High
• Moderate
• Low

Why is this maintenance needed?

Right now, when we test drop-downs in Rails applications, we use a custom method to interact with the drop-down. This method behaves unreliably and does not seem to wait for Javascript to render, as Capybara matchers do.

I am not sure what makes it so that Capybara does not recognize the select, but I worry that this also means that people using screen readers and other assistive technology would have a difficult time using the select menus.

Acceptance criteria

• The visual appearance of the select stays the same
• You can use the select with a screen reader
• Capybara's .select method recognizes the element as a select and can choose an option from it

Implementation notes, if any

This ticket blocks pulibrary/approvals#1165