Bump github.com/containerd/containerd from 1.6.12 to 1.7.6 in /utils/tracing/go #743

Job	Run time
Build and push all images (geo)	5m 49s
Build and push all images (profile)	4m 46s
Build and push all images (rate)	5m 1s
Build and push all images (recommendation)	4m 31s
Build and push all images (reservation)	5m 38s
Build and push all images (user)	6m 17s
Build and push all images (search)	3m 47s
Test Knative Deployment (hotel-app-geo, kn-geo.yaml)	2m 48s
Test Docker Compose (geo)	1m 17s
Test Knative Deployment (hotel-app-geo-tracing, kn-geo-tracing.yaml)	2m 56s
Test Docker Compose (geo-tracing)	1m 18s
Test Knative Deployment (hotel-app-profile, kn-profile.yaml)	3m 11s
Test Docker Compose (profile)	1m 19s
Test Docker Compose (rate)	1m 21s
Test Knative Deployment (hotel-app-rate, kn-rate.yaml)	3m 25s
Test Docker Compose (recommendation)	1m 15s
Test Knative Deployment (hotel-app-recommendation, kn-recommendation.yaml)	2m 34s
Test Knative Deployment (hotel-app-reservation, kn-reservation.yaml)	2m 48s
Test Docker Compose (reservation)	1m 17s
Test Knative Deployment (hotel-app-user, kn-user.yaml)	2m 25s
Test Docker Compose (user)	1m 15s
Test Knative Deployment (hotel-app-search, kn-search.yaml)	3m 11s
Test Docker Compose (search)	1m 22s
Test Knative Deployment (hotel-app-search-tracing, kn-search-tracing.yaml)	2m 40s
Test Docker Compose (search-tracing)	1m 21s
	1h 13m 32s

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