Add gRPC probe for agent #2392

Job	Run time
unpack-envvars	1s
Docker Build Images (datacatalog) / build_docker	2m 4s
Docker Build Images (flyteadmin) / build_docker	2m 42s
Docker Build Images (flytecopilot) / build_docker	4m 20s
Docker Build Images (flytepropeller) / build_docker	3m 0s
Build Images / Build & Push Image (datacatalog) / Push to Github Registry	2m 43s
Build Images / Build & Push Image (flyteadmin) / Push to Github Registry	3m 27s
Build Images / Build & Push Image (flytecopilot) / Push to Github Registry	2m 41s
Build Images / Build & Push Image (flytepropeller) / Push to Github Registry	3m 26s
Build Images / Build & Push Image (flytescheduler) / Push to Github Registry	3m 31s
Lint (flyteplugins) / Run Lint	3m 1s
Lint (datacatalog) / Run Lint	2m 26s
Lint (flyteadmin) / Run Lint	3m 25s
Lint (flyteidl) / Run Lint	1m 49s
Lint (flytepropeller) / Run Lint	3m 23s
Check Go Generate (datacatalog) / Go Generate	1m 23s
Lint (flytestdlib) / Run Lint	2m 47s
Check Go Generate (flytecopilot) / Go Generate	1m 18s
Check Go Generate (flyteadmin) / Go Generate	2m 34s
Check Go Generate (flytepropeller) / Go Generate	2m 22s
Unit Tests (datacatalog) / Run Unit Test	2m 46s
Unit Tests (flyteadmin) / Run Unit Test	4m 30s
Unit Tests (flyteplugins) / Run Unit Test	3m 57s
Unit Tests (flytepropeller) / Run Unit Test	4m 0s
Unit Tests (flytecopilot) / Run Unit Test	2m 34s
Unit Tests (flytestdlib) / Run Unit Test	3m 51s
Integration Test (flyteadmin) / Integration tests	5m 45s
	1h 19m 46s

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