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• The pull request must only fix one issue at the time.
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What does this PR do?

EXECUTOR_NUMBER environment variable is only available for specific steps, i.e. in DatadogStepListener.
Executor number has to be propagated from step to its corresponding stage, and from stage to pipeline (only for the first step in the pipeline).

https://datadoghq.atlassian.net/browse/SCV-210

Description of the Change

Alternate Designs

Possible Drawbacks

Verification Process

Additional Notes

Release Notes

Review checklist (to be filled by reviewers)

• Feature or bug fix MUST have appropriate tests (unit, integration, etc...)
• 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 one changelog/ label attached. If applicable it should have the backward-incompatible label attached.
• PR should not have do-not-merge/ label attached.
• If Applicable, issue must have kind/ and severity/ labels attached at least.