Replace `RemoteWebDriver` usage with `IWebDriver`

[YevgeniyShunevych]

Replace everywhere usage of RemoteWebDriver with IWebDriver:

• AtataContext.Driver property.
• AtataContextBuilder.UseDriver methods.
• IDriverFactory.Create method.
• DriverAtataContextBuilder<TBuilder>.CreateDriver method.
• DriverAtataContextBuilder<TBuilder, TService, TOptions>.CreateDriver method.
• UIComponent.Driver property.
• TriggerContext<TOwner>.Driver property.

Migration to v2.0.0

• Driver.ExecuteScript(...) -> Driver.AsScriptExecutor().ExecuteScript(...)
• Driver.GetScreenshot() -> Driver.AsScreenshotTaker().GetScreenshot()