[Bug] Access denied when trying to view unit test failure results

[jonalmeida]

When clicking on "Unit Test Results" in the Github UI to see the results AND in the Taskcluster artifacts, we see access denied for many resources aside from the index.html.

<Error>
<Code>AccessDenied</Code>
<Message>Access Denied</Message>
<RequestId>97ED96C9E4A014DE</RequestId>
<HostId>
X1BVn71kINqfRMTF7aiiw7TmhCBbfjyNIvJvJOC2VbDLNLBlGAjfyUFNjVYfuSLumo/kZtc+99M=
</HostId>
</Error>

Example link: https://firefox-ci-tc.services.mozilla.com/tasks/dk6jXf6ST5OjXtr0XKkGzg#artifacts

┆Issue is synchronized with this Jira Task

[jonalmeida]

cc @NotWoods for reference since I believe you had originally worked on this.

[NotWoods]

It seems that the URL changed, I'll send a PR soon to update it