Add flytectl install script #51

Job	Run time
unpack-envvars	1s
flyteadmin integration tests image / build_docker	2m 7s
Build Images / Build & Push Image (flyteadmin) / Push to Github Registry	2m 11s
Build Images / Build & Push Image (datacatalog) / Push to Github Registry	27s
Build Images / Build & Push Image (flytecopilot) / Push to Github Registry	2m 10s
Build Images / Build & Push Image (flytepropeller) / Push to Github Registry	45s
Build Images / Build & Push Image (flytescheduler) / Push to Github Registry	2m 10s
Dry Run Goreleaser	2m 2s
Test Getting started	2m 8s
Lint (datacatalog) / Run Lint	1m 53s
Lint (flytectl) / Run Lint	1m 38s
Lint (flyteadmin) / Run Lint	2m 9s
Lint (flyteidl) / Run Lint	1m 28s
Lint (flyteplugins) / Run Lint	2m 7s
Lint (flytepropeller) / Run Lint	2m 8s
Lint (flytestdlib) / Run Lint	2m 7s
Unit Tests (datacatalog) / Run Unit Test	1m 43s
Unit Tests (flyteadmin) / Run Unit Test	1m 25s
Unit Tests (flytecopilot) / Run Unit Test	1m 20s
Unit Tests (flytectl) / Run Unit Test	15s
Unit Tests (flyteplugins) / Run Unit Test	32s
Unit Tests (flytepropeller) / Run Unit Test	1s
Check Go Generate (datacatalog) / Go Generate	5s
Check Go Generate (flyteadmin) / Go Generate	1s
Check Go Generate (flytecopilot) / Go Generate	1s
Check Go Generate (flytectl) / Go Generate	1s
Check Go Generate (flytepropeller) / Go Generate	1s
Unit Tests (flytestdlib) / Run Unit Test	1s
Integration Test	1s
	32m 58s

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