Fix browser extension flaky e2e tests
Created by: erzhtor
Seems like the browser extension e2e test for checking the Hover popup -> "Go to definition" -> href
is flaky, because it gets updated.
Updated to use the similar approach from original hover regression tests: https://sourcegraph.com/github.com/sourcegraph/sourcegraph/-/blob/client/web/src/regression/codeintel.test.ts?L382
How to test
sg test bext-build
sg test bext-e2e