Add gRPC probe for agent #2294

Job	Run time
unpack-envvars	1s
Docker Build Images (datacatalog) / build_docker	2m 18s
Docker Build Images (flyteadmin) / build_docker	2m 48s
Docker Build Images (flytecopilot) / build_docker	2m 6s
Docker Build Images (flytepropeller) / build_docker	2m 49s
Build Images / Build & Push Image (datacatalog) / Push to Github Registry	2m 31s
Build Images / Build & Push Image (flyteadmin) / Push to Github Registry	3m 21s
Build Images / Build & Push Image (flytecopilot) / Push to Github Registry	2m 37s
Build Images / Build & Push Image (flytepropeller) / Push to Github Registry	3m 30s
Build Images / Build & Push Image (flytescheduler) / Push to Github Registry	3m 11s
Check Go Generate (flytecopilot) / Go Generate	1m 28s
Check Go Generate (datacatalog) / Go Generate	1m 17s
Check Go Generate (flyteadmin) / Go Generate	2m 26s
Check Go Generate (flytepropeller) / Go Generate	2m 25s
Lint (flyteadmin) / Run Lint	3m 19s
Lint (datacatalog) / Run Lint	2m 35s
Lint (flyteidl) / Run Lint	2m 18s
Lint (flyteplugins) / Run Lint	3m 6s
Lint (flytestdlib) / Run Lint	2m 53s
Lint (flytepropeller) / Run Lint	3m 16s
Unit Tests (datacatalog) / Run Unit Test	3m 20s
Unit Tests (flyteadmin) / Run Unit Test	4m 25s
Unit Tests (flytecopilot) / Run Unit Test	2m 39s
Unit Tests (flyteplugins) / Run Unit Test	3m 46s
Unit Tests (flytestdlib) / Run Unit Test	3m 47s
Unit Tests (flytepropeller) / Run Unit Test	4m 12s
Integration Test (flyteadmin) / Integration tests	5m 45s
	1h 18m 9s

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