web: split E2E tests per team based on survey results
Created by: valerybugakov
Context
Split E2E tests from one file into multiple modules named after teams responsible for maintaining them. For more details, please review the RFC 544 REVIEW: E2E/QA Survey Results.
Closes https://github.com/sourcegraph/sourcegraph/issues/30173. Closes https://github.com/sourcegraph/sourcegraph/issues/25949.
Test plan
- E2E tests are green on CI.
- E2E tests are split into multiple modules named after the teams responsible for maintaining them