Disable search engine popup in system specs

Since Chrome 128 there is a Search Engine selection
popup even in headless mode that needs to be accepted.
This leads to Capybara Element not found exceptions during
system specs.

Refs: SeleniumHQ/selenium#14438
(cherry picked from commit c368c16)

templates/spec/support/solidus_starter_frontend/capybara.rb

@@ -14,14 +14,17 @@
 
   config.before(:each, type: :system, js: true) do |example|
     screen_size = example.metadata[:screen_size] || [1800, 1400]
-    driven_by :selenium, using: :headless_chrome, screen_size: screen_size
+    driven_by(:selenium, using: :headless_chrome, screen_size: screen_size) do |capabilities|
+      capabilities.add_argument("--disable-search-engine-choice-screen")
+    end
   end
 end
 
 Capybara.register_driver :selenium_chrome_headless_docker_friendly do |app|
   browser_options = ::Selenium::WebDriver::Chrome::Options.new
   browser_options.args << '--headless'
   browser_options.args << '--disable-gpu'
+  browser_options.args << '--disable-search-engine-choice-screen'
   # Sandbox cannot be used inside unprivileged Docker container
   browser_options.args << '--no-sandbox'
   Capybara::Selenium::Driver.new(app, browser: :chrome, options: browser_options)