Add flytectl install script #48

Job	Run time
unpack-envvars	1s
flyteadmin integration tests image / build_docker	2m 26s
Build Images / Build & Push Image (datacatalog) / Push to Github Registry	2m 22s
Build Images / Build & Push Image (flyteadmin) / Push to Github Registry	26s
Build Images / Build & Push Image (flytecopilot) / Push to Github Registry	2m 9s
Build Images / Build & Push Image (flytepropeller) / Push to Github Registry	29s
Build Images / Build & Push Image (flytescheduler) / Push to Github Registry	2m 17s
Dry Run Goreleaser	2m 0s
Test Getting started	2m 4s
Check Go Generate (datacatalog) / Go Generate	4s
Check Go Generate (flyteadmin) / Go Generate	5s
Check Go Generate (flytecopilot) / Go Generate	5s
Check Go Generate (flytectl) / Go Generate	4s
Check Go Generate (flytepropeller) / Go Generate	8s
Lint (datacatalog) / Run Lint	1m 36s
Lint (flyteadmin) / Run Lint	1m 51s
Lint (flytectl) / Run Lint	1m 34s
Lint (flyteidl) / Run Lint	1m 15s
Lint (flyteplugins) / Run Lint	1m 31s
Lint (flytepropeller) / Run Lint	1m 38s
Unit Tests (datacatalog) / Run Unit Test	14s
Lint (flytestdlib) / Run Lint	33s
Unit Tests (flyteadmin) / Run Unit Test	1s
Unit Tests (flytectl) / Run Unit Test	1s
Unit Tests (flytecopilot) / Run Unit Test	1s
Unit Tests (flyteplugins) / Run Unit Test	1s
Unit Tests (flytepropeller) / Run Unit Test	1s
Unit Tests (flytestdlib) / Run Unit Test	1s
Integration Test	1s
	24m 59s

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