Massage and Ingest Code Coverage Json Summary and Send to ES

Currently, we have 2 indexes

2 for the Code Coverage Job

https://buildkite.com/elastic/kibana-code-coverage-main

1. kibana_code_coverage
2. kibana_total_code_coverage

How it works

It starts with buildkite

At the time of this writing, the code coverage job steps are:

env:
  CODE_COVERAGE: '1'
  NODE_ENV: 'test'
  DISABLE_MISSING_TEST_REPORT_ERRORS: 'true'
steps:

#  .. MYRIAD STEPS BEFORE CODE COVERAGE BEGINS ..
    
  - command: .buildkite/scripts/steps/code_coverage/ingest.sh
    label: 'Merge and Ingest'
    agents:
      queue: n2-4
    depends_on:
      - jest
      - oss-cigroup
      - default-cigroup
    timeout_in_minutes: 60
    key: ingest
          
  - wait: ~
    continue_on_failure: true

At the end of .buildkite/scripts/steps/code_coverage/ingest.sh is: echo "--- Ingest results to Kibana stats cluster". The code that comes after that echo statement starts the process.

Configuration

There is really only one config step.
The index mapping for one of of the indexes has to be manually created.
Currently, we just add it using Kibana's Dev Tools.