[BUG] Fix setting of service_account from PodTemplate (#4536) #933

Job	Run time
unpack-envvars	1s
Docker Build Images (datacatalog) / build_docker	2m 5s
Docker Build Images (flyteadmin) / build_docker	2m 58s
Docker Build Images (flytepropeller) / build_docker	3m 26s
Docker Build Images (flytecopilot) / build_docker	2m 5s
Build Images / Build & Push Image (datacatalog) / Push to Github Registry	2m 39s
Build Images / Build & Push Image (flyteadmin) / Push to Github Registry	4m 13s
Build Images / Build & Push Image (flytecopilot) / Push to Github Registry	2m 36s
Build Images / Build & Push Image (flytepropeller) / Push to Github Registry	4m 20s
Build Images / Build & Push Image (flytescheduler) / Push to Github Registry	3m 52s
Lint (datacatalog) / Run Lint	2m 53s
Lint (flyteadmin) / Run Lint	3m 36s
Lint (flyteidl) / Run Lint	2m 1s
Lint (flyteplugins) / Run Lint	3m 21s
Lint (flytepropeller) / Run Lint	3m 51s
Lint (flytestdlib) / Run Lint	2m 35s
Check Go Generate (datacatalog) / Go Generate	1m 32s
Check Go Generate (flyteadmin) / Go Generate	2m 9s
Check Go Generate (flytecopilot) / Go Generate	1m 16s
Check Go Generate (flytepropeller) / Go Generate	2m 50s
Unit Tests (datacatalog) / Run Unit Test	2m 43s
Unit Tests (flyteadmin) / Run Unit Test	3m 56s
Unit Tests (flytecopilot) / Run Unit Test	2m 31s
Unit Tests (flyteplugins) / Run Unit Test	3m 53s
Unit Tests (flytepropeller) / Run Unit Test	4m 4s
Unit Tests (flytestdlib) / Run Unit Test	3m 24s
Integration Test (flyteadmin) / Integration tests	5m 31s
	1h 20m 21s

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