Fix the reCAPTCHA spec failures by not rendering the widget in test mode

We've seen changes in behavior in the reCAPTCHA widget that led to test failures.
To avoid these issues, don't render the widget at all in test mode.

Closes #45138

app/views/shared/_recaptcha_form.html.haml

@@ -10,7 +10,7 @@
       = hidden_field(resource_name, field, value: value)
     = hidden_field_tag(:spam_log_id, spammable.spam_log.id)
     = hidden_field_tag(:recaptcha_verification, true)
-    = recaptcha_tags script: script, callback: 'recaptchaDialogCallback'
+    = recaptcha_tags script: script, callback: 'recaptchaDialogCallback' unless Rails.env.test?
 
     -# Yields a block with given extra params.
     = yield

spec/features/issues/spam_issues_spec.rb

@@ -34,9 +34,6 @@ describe 'New issue', :js do
 
       click_button 'Submit issue'
 
-      # reCAPTCHA alerts when it can't contact the server, so just accept it and move on
-      page.driver.browser.switch_to.alert.accept
-
       # it is impossible to test recaptcha automatically and there is no possibility to fill in recaptcha
       # recaptcha verification is skipped in test environment and it always returns true
       expect(page).not_to have_content('issue title')