update RC interval setting for REMOTE_CONFIG_MOCKED_BACKEND_LIVE_DEBUGGING

[smola]

Motivation

It seems this scenario intended to run RC polling at 1s intervals, but the env var used is a legacy form from dotnet, not supported in all tracers. Change to the newer, standard env var. This moves interval from 5s (default) to 1s for all tracers.

Changes

Workflow

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   • Test logic is modified? -> Get a review from RFC owner.
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Reviewer checklist

• Anything but tests/ or manifests/ is modified ? I have the approval from R&P team
• A docker base image is modified?
  • the relevant build-XXX-image label is present
• A scenario is added, removed or renamed?
  • Get a review from R&P team

[github-actions]

CODEOWNERS have been resolved as:

utils/_context/_scenarios/__init__.py                                   @DataDog/system-tests-core

[datadog-datadog-prod-us1-2]

🎉 All green!

❄️ No new flaky tests detected
🧪 All tests passed

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[cbeauchesne]

Do you mind getting a review from the debugger team ?