Add flytectl install script #55

Job	Run time
unpack-envvars	1s
flyteadmin integration tests image / build_docker	2m 56s
Build Images / Build & Push Image (datacatalog) / Push to Github Registry	4m 20s
Build Images / Build & Push Image (flyteadmin) / Push to Github Registry	5m 54s
Build Images / Build & Push Image (flytecopilot) / Push to Github Registry	4m 6s
Build Images / Build & Push Image (flytepropeller) / Push to Github Registry	24s
Build Images / Build & Push Image (flytescheduler) / Push to Github Registry	5m 22s
Dry Run Goreleaser	7m 38s
Test Getting started	5m 1s
Check Go Generate (datacatalog) / Go Generate	8s
Check Go Generate (flyteadmin) / Go Generate	8s
Check Go Generate (flytecopilot) / Go Generate	6s
Check Go Generate (flytectl) / Go Generate	6s
Check Go Generate (flytepropeller) / Go Generate	7s
Lint (datacatalog) / Run Lint	2m 4s
Lint (flyteadmin) / Run Lint	2m 39s
Lint (flytectl) / Run Lint	1m 39s
Lint (flyteidl) / Run Lint	1m 25s
Lint (flyteplugins) / Run Lint	2m 43s
Lint (flytepropeller) / Run Lint	2m 42s
Lint (flytestdlib) / Run Lint	2m 2s
Unit Tests (datacatalog) / Run Unit Test	2m 32s
Unit Tests (flyteadmin) / Run Unit Test	3m 52s
Unit Tests (flytecopilot) / Run Unit Test	2m 8s
Unit Tests (flytectl) / Run Unit Test	2m 49s
Unit Tests (flyteplugins) / Run Unit Test	3m 27s
Unit Tests (flytepropeller) / Run Unit Test	3m 43s
Unit Tests (flytestdlib) / Run Unit Test	3m 22s
Integration Test (flyteadmin) / Integration tests	6m 3s
	1h 19m 27s

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