Update e2e spec metrics export data
What does this MR do and why?
Minor improvements to metrics exports:
- Remove
retried
field which is redundant as we use customflaky
status to indicate retry - Export all specs, even skipped ones due to environment incompatibility (it's easy to filter out when building graphs and we might want full data)
- Simplify
quarantined
detection - Add exception class tag
Related to: gitlab-org/quality/quality-engineering/team-tasks#2259 (closed)
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Edited by Andrejs Cunskis