[FEATURE] Release branch code coverage details

[prudhvigodithi]

Is your feature request related to a problem?

Coming from central release dashboard #51, have a visualization in central release dashboard to able to see the Release branch code coverage scores.

What solution would you like?

• Use the code coverage API.
• Filter per repo and branch.
• Take the completed run from the latest head commit.
• Get the Code coverage score.

Example https://api.codecov.io/api/v2/github/opensearch-project/repos/index-management/commits?branch=main

Do you have any additional context?

• Some of the repos the code coverage timestamp is older even while the repo is active.
• The coverage shown is for the older commit even though the head commit is different.

Acceptance Criteria

• Onboard the code coverage metrics for repos participating in the release, the code already has a logic to use the input manifest, re-use this logic.

• Implement a mechanism to integrate with existing release metrics and the central release dashboard. Add shared keys that are part of other release metric indices to enable a common filter across all documents and indices, including Codecov data.

• Handle cases where Codecov returns a null commit ID, null coverage, or missing data, as repositories do not always upload or publish coverage for the latest commits or pull requests.

• Instead erroring with null data, handle the state with no-coverage, the commitID as noneandcoverageto0.0`

"_source": {
    "coverage": 0,
    "current_date": "2024-10-28T17:54:41.742113549",
    "component": "OpenSearch",
    "id": "09c026db-49b3-3502-ae80-717c6db4b8e1",
    "commitid": "none",
    "state": "no-coverage",
    "repository": "OpenSearch",
    "release_version": "2.18.0",
    "release_state": "open",
    "version": "2.18.0",
    "branch": "2.18",
    "url": "https://api.codecov.io/api/v2/github/opensearch-project/repos/OpenSearch/commits?branch=2.18"
  },

• Along with coverage information add the API URL to the documents which will help users to navigate and see the exact no coverage information and other coverage details.
  Example https://api.codecov.io/api/v2/github/opensearch-project/repos/OpenSearch/commits?branch=2.18
  

[prudhvigodithi]

The codecov metrics is now flowing in Dashboard Discover Link.

The visualization is part of OpenSearch Component Release Metrics dashboard.

Thank you
@getsaurabh02