Add pod template support for init containers #4667

Job	Run time
unpack-envvars	1s
flyteadmin integration tests image / build_docker	4m 56s
Build Images / Build & Push Image (datacatalog) / Push to Github Registry	4m 22s
Build Images / Build & Push Image (flyteadmin) / Push to Github Registry	5m 32s
Build Images / Build & Push Image (flytecopilot) / Push to Github Registry	4m 17s
Build Images / Build & Push Image (flytepropeller) / Push to Github Registry	6m 11s
Build Images / Build & Push Image (flytescheduler) / Push to Github Registry	5m 39s
Dry Run Goreleaser	7m 51s
Test Getting started	9m 25s
Check Go Generate (datacatalog) / Go Generate	1m 43s
Check Go Generate (flyteadmin) / Go Generate	2m 15s
Check Go Generate (flytecopilot) / Go Generate	1m 51s
Check Go Generate (flytectl) / Go Generate	2m 23s
Lint (datacatalog) / Run Lint	2m 15s
Check Go Generate (flytepropeller) / Go Generate	2m 7s
Lint (flyteadmin) / Run Lint	2m 53s
Lint (flytectl) / Run Lint	2m 31s
Lint (flyteidl) / Run Lint	1m 42s
Lint (flyteplugins) / Run Lint	2m 46s
Lint (flytepropeller) / Run Lint	2m 56s
Lint (flytestdlib) / Run Lint	2m 27s
Unit Tests (datacatalog) / Run Unit Test	2m 53s
Unit Tests (flyteadmin) / Run Unit Test	4m 22s
Unit Tests (flytecopilot) / Run Unit Test	2m 34s
Unit Tests (flytectl) / Run Unit Test	3m 31s
Unit Tests (flyteplugins) / Run Unit Test	3m 41s
Unit Tests (flytepropeller) / Run Unit Test	4m 6s
Unit Tests (flytestdlib) / Run Unit Test	3m 35s
Integration Test (flyteadmin) / Integration tests	5m 58s
	1h 46m 43s

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