Configure Codecov for coverage

[Shaunak01]

Follow up from : #487

Specs:

1. Run the coverage once every week for the 3 builds (fast, slow and superslow).
2. Is there a way to merge the 3 coverages to get the total one? (Look into slection of the flags to combine reports on codecov directly)
3. Let's replace the old coverage system, adding a link in the BM view (@dremdem pls guide to this once we are done with other specs)
4. Let's put together a short doc of how the system works, etc.
5. Let's start with helpers and then we extend to the other repos.
6. We can report a break if the coverage decreases more than 1% in a week. Ideally we want to only have coverage increase. (IMO lets leave this for last)

FYI @dremdem @gpsaggese

[Shaunak01]

PR: #598

• Fast, slow and combined test coverage: Everday
• Superslow test : Everyweek
• Fails if combined tests coverage drop by 1%
• link: Link to dashboard
• Once merged master coverage should be visible on codecov\

[dremdem]

3. Let's replace the old coverage system, adding a link in the BM view (@dremdem pls guide to this once we are done with other specs)

Just need to add the link into the
https://github.com/causify-ai/helpers/blob/3c03e71d8dde66f24ba7b6f46d48274a7c671a6d/dev_scripts_helpers/update_devops_packages/notebooks/Master_buildmeister_dashboard.ipynb

Section: Code coverage HTML-page

[Shaunak01]

• Now we have 3 flags - fast, slow, superslow

All can be viewed at: https://app.codecov.io/gh/causify-ai/helpers/tree/HelpersTask597_Configure_Codecov_for_coverage

• @gpsaggese to remove combined_fast_slow
  • Reason: Codecov gives us the total coverage percentage and an option to combine different flags on the UI itself.

As discussed,
- Fast and slow test coverage will run Everyday
- Superslow will run once a week
- Comments are turned off
- Everyday a check will happen if the coverage drops by 1% (including all three tests)

[gpsaggese]

What's left to do? See list above?

• Document?
• Add to the BM routine?
• Then release to all the other repos?
• What else?