Refactor: reduce duplication, condense method implementation

[iliakur]

What does this PR do?

Motivation

We use essentially the same logic to convert ES health statuses to DD statuses in two places. This PR unifies the two approaches.

Additional Notes

Review checklist (to be filled by reviewers)

• Feature or bugfix MUST have appropriate tests (unit, integration, e2e)
• PR title must be written as a CHANGELOG entry (see why)
• Files changes must correspond to the primary purpose of the PR as described in the title (small unrelated changes should have their own PR)
• PR must have changelog/ and integration/ labels attached
• If the PR doesn't need to be tested during QA, please add a qa/skip-qa label.

[iliakur]

Current dependencies on/for this PR:

• master
  • PR Refactor: reduce duplication, condense method implementation #14501 👈
    • PR Submitted metric types match the types declared in metadata #14502

This comment was auto-generated by Graphite.

[iliakur]

To reviewer: I'm not happy with these names, alternatives welcome!

[github-actions]

Test Results

     20 files       20 suites   6m 8s ⏱️
   108 tests    105 ✔️   3 💤 0 ❌
1 090 runs  1 023 ✔️ 67 💤 0 ❌

Results for commit 9945a3a.

[codecov]

Codecov Report

Merging #14501 (9945a3a) into master (11e6972) will increase coverage by 0.00%.
The diff coverage is 100.00%.

Flag	Coverage Δ
elastic	91.91% <100.00%> (+0.58%)	⬆️

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