Add validation for include_aggregated_endpoint

[yzhan289]

What does this PR do?

This PR adds validation for include_aggregated_endpoint requiring it to be true when unaggregated_endpoint is unspecified. Otherwise, the check will run and collect nothing:

andrew.zhang@COMP-C02F513WML87 integrations-core % ddev env check rabbitmq          
=========
Collector
=========

  Running Checks
  ==============
    
    rabbitmq (3.3.0)
    ----------------
      Instance ID: rabbitmq:1f8a86b67a8bf2a9 [OK]
      Configuration Source: file:/etc/datadog-agent/conf.d/rabbitmq.d/rabbitmq.yaml
      Total Runs: 1
      Metric Samples: Last Run: 0, Total: 0
      Events: Last Run: 0, Total: 0
      Service Checks: Last Run: 0, Total: 0
      Average Execution Time : 31ms
      Last Execution Date : 2023-01-24 21:12:23 UTC (1674594743000)
      Last Successful Execution Date : 2023-01-24 21:12:23 UTC (1674594743000)
      

Check has run only once, if some metrics are missing you can try again with --check-rate to see any other metric if available.

Motivation

QA for #13662

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.

[codecov]

Codecov Report

Merging #13793 (2be264f) into master (c329441) will not change coverage.
The diff coverage is n/a.

Flag	Coverage Δ
rabbitmq	95.53% <ø> (ø)

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