Update queue metrics to correctly calculate pipeline names

[nikita-tkachenko-datadog]

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What does this PR do?

Updates logic that calculates queue metrics.
Queue metrics are tagged with job name.
In case the queued item was a pipeline in a quiet period, the logic was not calculating the name correctly.

Description of the Change

Alternate Designs

Possible Drawbacks

Verification Process

Added an integration test.

Additional Notes

Release Notes

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