Fix test, and ensure the test description doesn't have a datetime in it

Context

• Remove :failed category when receiving a non-su... (!166329 - merged) was merged
• It provoked thousands of test health issues, so we quarantined two spec files that were introduced from that MR

What does this MR do and why?

This MR does the two things mentioned in the quarantine MR description:

This MR quarantines those test files until we have two fixes in place:

1. We fixed the underlying flakiness issue
2. We ensure the RSpec test description does not contain a timestamp (this is until a more general fix is available)

1. has several possible fixes that I left as MR suggestions. 2. is contained in a commit.

References

Contributes to gitlab-org/quality/analytics/team#75 (closed).

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