[flyte-core] Create separate grpc service for flyteadmin #2961

Job	Run time
unpack-envvars	1s
Docker Build Images (flyteadmin) / build_docker	2m 45s
Docker Build Images (flytepropeller) / build_docker	2m 59s
Docker Build Images (datacatalog) / build_docker	2m 6s
Docker Build Images (flytecopilot) / build_docker	1m 59s
Build Images / Build & Push Image (datacatalog) / Push to Github Registry	2m 27s
Build Images / Build & Push Image (flyteadmin) / Push to Github Registry	3m 56s
Build Images / Build & Push Image (flytecopilot) / Push to Github Registry	2m 34s
Build Images / Build & Push Image (flytepropeller) / Push to Github Registry	3m 29s
Build Images / Build & Push Image (flytescheduler) / Push to Github Registry	3m 24s
Check Go Generate (flyteadmin) / Go Generate	2m 25s
Check Go Generate (datacatalog) / Go Generate	1m 34s
Check Go Generate (flytecopilot) / Go Generate	1m 33s
Check Go Generate (flytepropeller) / Go Generate	6s
Lint (datacatalog) / Run Lint	2m 19s
Lint (flyteadmin) / Run Lint	3m 9s
Lint (flyteidl) / Run Lint	1m 54s
Lint (flyteplugins) / Run Lint	3m 2s
Lint (flytepropeller) / Run Lint	3m 20s
Lint (flytestdlib) / Run Lint	2m 34s
Unit Tests (flyteadmin) / Run Unit Test	4m 55s
Unit Tests (flytecopilot) / Run Unit Test	2m 53s
Unit Tests (flyteplugins) / Run Unit Test	4m 26s
Unit Tests (flytepropeller) / Run Unit Test	4m 36s
Unit Tests (flytestdlib) / Run Unit Test	4m 6s
Unit Tests (datacatalog) / Run Unit Test	3m 4s
Integration Test (flyteadmin) / Integration tests	5m 44s
	1h 17m 20s

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