[Epic] Move the `Task` related methods

[Himangini]

Description

See comment here

(7~ methods) Tasks for creating/deleting stacks (returning a *tasks.TaskTree) e.g.NewTasksToCreateIAMServiceAccounts, NewTasksToDeleteIAMServiceAccounts, DeleteTasksForDeprecatedStacks

We need to

• Move the Task related methods out of here and into their respective pkg/actions/<resource-name> packages. Similar to how irsa/addon/karpenter/fargate all currently work

[github-actions[bot]]

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[TiberiuGC]

Closing this issue as I've split the work into multiple tickets (#6961, #6962, #6963 and #6964) and updated estimations.