E2E: Update reliable spec report creation

What does this MR do and why?

Describe in detail what your merge request does and why.

• Fetch data from multiple run types to make sure test is stable on all environments
• Create one report issue for stable specs and reliable specs with failures
• Post only summary tables to slack and link to report issue

Related issue: https://gitlab.com/gitlab-org/quality/team-tasks/-/issues/994

Screenshots or screen recordings

Example report: #347413 (closed)

Running locally

bundle exec rake reliable_spec_report

Bear minimum, command requires following variables:

• QA_INFLUXDB_URL - influxdb instance url, https://influxdb.quality.gitlab.net/
• QA_INFLUXDB_TOKEN - influxdb read token, can be found in QA vault

MR acceptance checklist

This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.

• I have evaluated the MR acceptance checklist for this MR.