Support for plugins

[brunofarache]

There are cases in which support for Playwright plugins is important.

For example, we would like to create a monitor that goes through some social login flows that may require captcha. One way of achieving this would be to use this stealth mode plugin: https://github.com/berstend/puppeteer-extra/tree/master/packages/playwright-extra#-puppeteer-extra-plugin-stealth.

Alternatively, Elastic's Synthetics framework could also offer the same stealth mode functionality to bypass captchas, but it's probably better to make it more extensive and support any Playwright plugin out there.