VSCE: add integration test cases for searching

Created by: abeatrix

Test cases created for searching in VSCE:

The current process:

1. We will start each case by clicking on the Sourcegraph Logo from the activity bar on the side.
2. Then we will perform a simple search test
3. Once the test results are loaded, we will click on the first filter (lang: go) in the sidebar to execute a new search test => test lang:go
4. Click on the first result from the new search results should lead us to the Repo Page
5. Click on the Back to search view from the Repo Page should take us back to the search results
6. Click on the file path in the second search result should open the remote file
7. Check for the page title to see if the remote file is opened accordingly
8. After each test is completed, we will close the remote file panel and the search panel with afterEach(async () => {})

Test plan

See above