webdriver is true on the new page about stealth

[ysmood]

For some reference: puppeteer/puppeteer#3667

waitForDebuggerOnStart is the key to solve it perfectly.

[ysmood]

@Abin01 I add a new function to support it, the unit test shows how to use it:

https://github.com/go-rod/rod/blob/899b00ac27e25786f0a6820a35164436b24bf21c/page_test.go#L251-L265

Some pseudo-code to demo how to use it with bypass lib:

func main() {
	wait, resume := page.WaitPauseOpen()

	go page.Element("a").Click()

	newPage := wait()

	newPage.EvalOnNewDocument(bypass.JS)
	resume()
}

[ysmood]

I will close it for now. If you have any problems please let us know.