Revert Mocha JUnit reporter usage
Created by: umpox
Description
We started generated JUnit reports through mocha-junit-reporter
in this PR: https://github.com/sourcegraph/sourcegraph/pull/28262
This library appears to swallow the output of the CI command, so errors become very difficult to debug
This PR reverts the test commands back to their state before this reporter was added
Issue to fix/re-enable: https://github.com/sourcegraph/sourcegraph/issues/31627
Test plan
- Break some Mocha tests (e.g. e2e or qa tests)
- Notice that the error is correctly surfaced in the command output