Functional test support

[gctucker]

KernelCI has been focusing on boot testing, but it now needs to full embrace functional testing. This means updating the kernelci.org frontend to show test results, adapt Mongo DB documents schema if needed and improve email reports with test results.

The outcome of this work is to remove all the current limiting factors that prevent KernelCI from expanding its functional testing coverage.

Web frontend work

Frontend Test Results milestone

• Show test counts rather than boot counts everywhere
• Fix or add test views to be able to navigate from a job / branch / kernel to a list of test cases
• Add detailed view of each test case regression
• Remove all remaining references to boot tests

Database backend work

Backend Test Results milestone

• Update Mongo DB documents schema to enable all the necessary views on the frontend
• Add Mongo DB indexes as appropriate to have good performance for the frontend use-case
• Rework test email reports to be able to only include test regressions, with links to full results

[gctucker]

All the changes have now been completed and rolled out in production.