Chained selectors where the second part starts with a scope did not work
before:
```ts
page.locator('div').locator(':scope + span')
page.locator('div >> +span')
```
Previously, we considered root when selector has `:scope` modifier, but
did not actually match it with other css specifiers, like in
`:scope.selected`.
Fixes#17824.
This patch introduces 109 "#smoke" tests - a subset of tests that makes
sure that basic Playwright functionality works. This set is loosely
defined; feel free to add/remove tests to the set. The only goal is to
keep this set minimal & fast to run.
I tried to pick tests so that various parts of Playwright functionality
are exercised.
