[rb] move Driver Finder logic out of Selenium Manager

[titusfortner]

Status

(Draft)

• Based on [rb] move logging and rspec matchers to top namespace #12298
• The bazel stuff needs to be updated still
• The point of this would be to release a separate gem, and there are a few other things we'd need to decide first

Description

This makes the SeleniumManager class a light wrapper of the binary. It only locates and executes. All processing of what goes to and what comes out of the Manager is done in the DriverFinder class.

Motivation and Context

The idea is we can release it as a separate gem and allow users of older Selenium versions to have access to the latest. I'm looking for an alternative to updating webdrivers based on conversation here titusfortner/webdrivers#247

With a selenium-manager.gem, webdrivers.gem can become a super small wrapper that allows backwards compatibility.