fix: Updating GPU utilization field for DGPU

[antoniomtz]

PR Checklist

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• Every commit is a single defect fix and does not mix feature addition or changes
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What are you changing?

Issue this PR will close

close: #256

Anything the reviewer should know when reviewing this PR?

Test Instructions if applicable

on serpent canyon, execute:

1. cd benchmark-scripts && PIPELINE_PROFILE="object_detection" DEVICE=GPU RENDER_MODE=0 sudo -E ./benchmark.sh --pipelines 5 --logdir testRun/5stream/run0 --duration 120 --init_duration 60 --platform dgpu.1 --inputsrc rtsp://127.0.0.1:8554/camera_0

2. make consolidate ROOT_DIRECTORY=testRun/5stream

Observe the values for GPU.0 on the summary.cvs file

If the there are associated PRs in other repositories, please link them here (i.e. intel-retail/automated-self-checkout )

[jim-wang-intel]

LGTM