Wait until the page gets loaded and the element ges rendered.

Example of failure:

```ruby
Selenium::WebDriver::Element raises if different element receives click
     Failure/Error: expect { driver.find_element(id: 'contents').click }.to raise_error(Error::ElementClickInterceptedError)

       expected Selenium::WebDriver::Error::ElementClickInterceptedError, got #<Selenium::WebDriver::Error::NoSuchElementError:"no such element: Unable to locate element: {\"metho...it: https://www.selenium.dev/documentation/webdriver/troubleshooting/errors#nosuchelementexception"> with backtrace:
         # ./rb/lib/selenium/webdriver/remote/response.rb:63:in `add_cause'
         # ./rb/lib/selenium/webdriver/remote/response.rb:41:in `error'
         # ./rb/lib/selenium/webdriver/remote/response.rb:52:in `assert_ok'
         # ./rb/lib/selenium/webdriver/remote/response.rb:34:in `initialize'
         # ./rb/lib/selenium/webdriver/remote/http/common.rb:103:in `new'
         # ./rb/lib/selenium/webdriver/remote/http/common.rb:103:in `create_response'
         # ./rb/lib/selenium/webdriver/remote/http/default.rb:103:in `request'
         # ./rb/lib/selenium/webdriver/remote/http/common.rb:68:in `call'
         # ./rb/lib/selenium/webdriver/remote/bridge.rb:625:in `execute'
         # ./rb/lib/selenium/webdriver/remote/bridge.rb:493:in `find_element_by'
         # ./rb/lib/selenium/webdriver/common/search_context.rb:71:in `find_element'
         # ./rb/spec/integration/selenium/webdriver/element_spec.rb:34:in `block (3 levels) in <module:WebDriver>'
         # ./rb/spec/integration/selenium/webdriver/element_spec.rb:34:in `block (2 levels) in <module:WebDriver>'
     # ./rb/spec/integration/selenium/webdriver/element_spec.rb:34:in `block (2 levels) in <module:WebDriver>'
```

See https://github.com/SeleniumHQ/selenium/actions/runs/19987626355/job/57324241360?pr=13739 for example.

instead of sleeping for 0.5s, just wait for the needed URL.

NB! The previous helper method `wait_for_new_url(old_url)` caused flaky tests because in Firefox, browsers changes URLs like this: "<old url>" -> "about:blank" -> "<new url>".

instead of sleeping for 2.5s, just wait for the needed logs.