[flyteagent] Add `agents` and `agentForTaskTypes` in helm chart #6126

Job	Run time
test-bootstrap	37s
build-and-push-single-binary-image	5m 23s
sandbox-bundled-functional-tests	18m 5s
sandbox-bundled-offloaded-functional-tests	18m 9s
build-and-push-sandbox-bundled-image	0s
	42m 14s

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