Implement `locator.locator`

[ankur22]

Feature Description

We want to be able to chain locators. This can make it easier to get to a particularly difficult element on the page when there are lots of nesting or it's difficult to build a distinct selector for the element we want, imagine rows in a table. This is also a prerequiste for other locator APIs which chain locators, such as the locator.getBy* APIs.

Suggested Solution (optional)

NA

Already existing or connected issues / PRs (optional)

NA