Send events to Data Streams backend

[piochelepiotr]

What does this PR do?

Double ship configs & schemas to event intake (for backwards compatibility) and to Data Streams intake.

Motivation

Events have 2 limitations:

1. No aggregation happens at the intake, leading to slow queries over long timeframes
2. Limit of 4k characters, meaning long configs & long schemas are not collected correctly.

Review checklist (to be filled by reviewers)

• Feature or bugfix MUST have appropriate tests (unit, integration, e2e)
• Add the qa/skip-qa label if the PR doesn't need to be tested during QA.
• If you need to backport this PR to another branch, you can add the backport/<branch-name> label to the PR and it will automatically open a backport PR once this one is merged

[chatgpt-codex-connector]

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Reviewed commit: 6bc4629453

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 89.04%. Comparing base (7fd6437) to head (c51f27f).
⚠️ Report is 6 commits behind head on master.

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