Add capi yolov8 docker compose use cases for gst-capi

PR Checklist

[x] Added label to the Pull Request for easier discoverability and search
[x] Commit Message meets guidelines as indicated in the URL https://github.com/intel-retail/retail-use-cases/blob/main/CONTRIBUTING.md
[x] Every commit is a single defect fix and does not mix feature addition or changes
[ ] Unit Tests have been added for new changes
[ ] Updated Documentation as relevant to the changes
[ ] All commented code has been removed
[ ] If you've added a dependency, you've ensured license is compatible with repository license and clearly outlined the added dependency.
[ ] PR change contains code related to security
[ ] PR introduces changes that breaks compatibility with other modules (If YES, please provide details below)

close: #issue_number

git clone this PR
build capi-yolov8 ensemble docker image:
```
make build-capi_yolov8_ensemble
```
make clean-results
to run: make run-capi_yolov8_ensemble
to run two pipelines: PIPELINE_COUNT=2 make run-capi_yolov8_ensemble
to shutdown: make down-capi_yolov8_ensemble