Add API to get domain #3788

Job	Run time
unpack-envvars	1s
flyteadmin integration tests image / build_docker	2m 37s
Build Images / Build & Push Image (datacatalog) / Push to Github Registry	4m 52s
Build Images / Build & Push Image (flyteadmin) / Push to Github Registry	5m 48s
Build Images / Build & Push Image (flytecopilot) / Push to Github Registry	3m 57s
Build Images / Build & Push Image (flytepropeller) / Push to Github Registry	6m 3s
Build Images / Build & Push Image (flytescheduler) / Push to Github Registry	5m 33s
Dry Run Goreleaser	7m 48s
Test Getting started	5m 55s
Check Go Generate (datacatalog) / Go Generate	1m 42s
Check Go Generate (flyteadmin) / Go Generate	2m 16s
Check Go Generate (flytecopilot) / Go Generate	1m 32s
Check Go Generate (flytectl) / Go Generate	2m 37s
Lint (datacatalog) / Run Lint	3m 10s
Check Go Generate (flytepropeller) / Go Generate	2m 4s
Lint (flyteadmin) / Run Lint	2m 59s
Lint (flytectl) / Run Lint	2m 59s
Lint (flyteidl) / Run Lint	1m 44s
Lint (flyteplugins) / Run Lint	2m 51s
Lint (flytepropeller) / Run Lint	3m 8s
Lint (flytestdlib) / Run Lint	2m 26s
Unit Tests (datacatalog) / Run Unit Test	2m 48s
Unit Tests (flytecopilot) / Run Unit Test	2m 25s
Unit Tests (flyteadmin) / Run Unit Test	4m 17s
Unit Tests (flytectl) / Run Unit Test	3m 14s
Unit Tests (flyteplugins) / Run Unit Test	3m 49s
Unit Tests (flytepropeller) / Run Unit Test	4m 5s
Unit Tests (flytestdlib) / Run Unit Test	3m 32s
Integration Test (flyteadmin) / Integration tests	6m 13s
	1h 42m 25s

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