update sagemaker agent setup doc as secrets aren't required anymore #2784

Job	Run time
unpack-envvars	1s
Docker Build Images (datacatalog) / build_docker	2m 4s
Docker Build Images (flyteadmin) / build_docker	2m 48s
Docker Build Images (flytecopilot) / build_docker	2m 4s
Docker Build Images (flytepropeller) / build_docker	3m 11s
Build Images / Build & Push Image (datacatalog) / Push to Github Registry	2m 31s
Build Images / Build & Push Image (flyteadmin) / Push to Github Registry	3m 30s
Build Images / Build & Push Image (flytecopilot) / Push to Github Registry	2m 45s
Build Images / Build & Push Image (flytepropeller) / Push to Github Registry	3m 28s
Build Images / Build & Push Image (flytescheduler) / Push to Github Registry	4m 5s
Check Go Generate (datacatalog) / Go Generate	1m 22s
Check Go Generate (flyteadmin) / Go Generate	2m 36s
Check Go Generate (flytecopilot) / Go Generate	1m 27s
Check Go Generate (flytepropeller) / Go Generate	2m 34s
Lint (datacatalog) / Run Lint	2m 35s
Lint (flyteadmin) / Run Lint	3m 15s
Lint (flyteidl) / Run Lint	1m 53s
Lint (flyteplugins) / Run Lint	3m 0s
Lint (flytepropeller) / Run Lint	3m 37s
Lint (flytestdlib) / Run Lint	2m 55s
Unit Tests (datacatalog) / Run Unit Test	2m 53s
Unit Tests (flyteadmin) / Run Unit Test	4m 14s
Unit Tests (flytecopilot) / Run Unit Test	2m 38s
Unit Tests (flyteplugins) / Run Unit Test	3m 52s
Unit Tests (flytepropeller) / Run Unit Test	4m 11s
Unit Tests (flytestdlib) / Run Unit Test	4m 6s
Integration Test (flyteadmin) / Integration tests	5m 43s
	1h 19m 18s

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