update search bar only acceptance test (#1696)

Search bar only acceptance test previously failed due to trailing slash appended to url (before the params). Updated to use slapshot's theme test site url instead of netlify url. Since the theme test site also append additional params (such as referrerPageUrl), the test is modified to check for the beginning portion of the url instead of the full url.

![Screen Shot 2022-03-29 at 11 51 04 AM](https://user-images.githubusercontent.com/36055303/160653017-052f45e2-3e53-495c-9e2e-1969b43f037d.png)

J=none
TEST=manual

ran `npx testcafe -c 3 "chrome:headless,firefox:headless" --config-file ./.circleci/testcafe_search_bar.json -q` (from config.yml) and see that test passed

package.json

@@ -242,4 +242,4 @@
     "./zh-Hant/modern.min": "./dist/zh-Hant-answers-modern.min.js",
     "./zh-Hant/template": "./dist/zh-Hant-answerstemplates.compiled.min.js"
   }
-}
+}

tests/acceptance/acceptancesuites/searchbaronlysuite.js

@@ -22,6 +22,6 @@ test('Basic search and redirect flow', async t => {
 
   const getUrl = ClientFunction(() => window.location.href);
   const clientUrl = await getUrl();
-  const expectedUrl = 'https://answers-js-demo.netlify.app/sites/rose?query=amani+farooque+phone+number';
-  await t.expect(clientUrl).eql(expectedUrl);
+  const expectedUrl = 'https://theme.slapshot.pagescdn.com/?query=amani+farooque+phone+number';
+  await t.expect(clientUrl.startsWith(expectedUrl)).ok();
 });

tests/acceptance/fixtures/html/searchbaronly.html

@@ -22,7 +22,7 @@
           this.addComponent('SearchBar', {
             container: '.search-bar-container',
             clearButton: true,
-            redirectUrl: 'https://answers-js-demo.netlify.app/sites/rose'
+            redirectUrl: 'https://theme.slapshot.pagescdn.com'
           });
         }
       });