Fix contribution thresholds for OpenTelemetry voter eligibility

[Arunodoy18]

• Reduce All_All contribution threshold from 10x to 5x multiplier
• Reduce RepoGroup_All contribution threshold from 5x to 2x multiplier
• Reduce All_Country contribution threshold from 5x to 2x multiplier
• This addresses the 25-contribution cutoff issue for OpenTelemetry elections
• Now includes developers with lower activity levels for voter roll generation

Fixes: OpenTelemetry election voter roll missing contributors with <25 contributions

Please make sure that you follow instructions from CONTRIBUTING

Specially:

• Check if all tests pass, see TESTING for deatils.
• Make sure you've added test coverage for new features/metrics.
• Make sure you have updated documentation.
• If you added a new metric, please make sure you have been following instructions about adding new metric.

[Arunodoy18]

I have done the fixes. If any changes is needed please inform.

[lukaszgryglicki]

Hi, thanks for this, I will get to this on my CNCF working day.
Please note that changing SQL means that given dashboard must be manually regenerated for given project(s), that means:

• I need to test if fix work first.
• • Then I need to regenerate pre-computed data for all projects that were modified.
• We're now doing a migration to new servers which may be higher priority.
• I have two weeks of vacation between Dec 4th - Dec 17th.

Just note that I will eventually work on this one, but it may take some time.