extend pod customization to include init containers #4531

Job	Run time
unpack-envvars	1s
flyteadmin integration tests image / build_docker	4m 59s
Build Images / Build & Push Image (flyteadmin) / Push to Github Registry	5m 13s
Build Images / Build & Push Image (datacatalog) / Push to Github Registry	4m 27s
Build Images / Build & Push Image (flytecopilot) / Push to Github Registry	3m 53s
Build Images / Build & Push Image (flytepropeller) / Push to Github Registry	5m 45s
Build Images / Build & Push Image (flytescheduler) / Push to Github Registry	5m 15s
Dry Run Goreleaser	7m 33s
Test Getting started	6m 6s
Lint (flyteadmin) / Run Lint	2m 54s
Lint (flytectl) / Run Lint	2m 25s
Lint (datacatalog) / Run Lint	2m 20s
Lint (flyteidl) / Run Lint	1m 43s
Lint (flyteplugins) / Run Lint	2m 52s
Lint (flytepropeller) / Run Lint	3m 0s
Lint (flytestdlib) / Run Lint	2m 33s
Unit Tests (flyteadmin) / Run Unit Test	4m 31s
Unit Tests (datacatalog) / Run Unit Test	2m 50s
Unit Tests (flytecopilot) / Run Unit Test	2m 29s
Unit Tests (flytectl) / Run Unit Test	3m 29s
Unit Tests (flytepropeller) / Run Unit Test	4m 0s
Unit Tests (flyteplugins) / Run Unit Test	3m 29s
Check Go Generate (datacatalog) / Go Generate	1m 26s
Unit Tests (flytestdlib) / Run Unit Test	3m 21s
Check Go Generate (flyteadmin) / Go Generate	2m 3s
Check Go Generate (flytecopilot) / Go Generate	1m 25s
Check Go Generate (flytectl) / Go Generate	1m 56s
Check Go Generate (flytepropeller) / Go Generate	2m 15s
Integration Test (flyteadmin) / Integration tests	6m 2s
	1h 40m 15s

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