…7315)

* Implement `update podidentityassociation`

* Implement `delete podidentityassociation`

* change create task order

* add integration test

* delete IAM role stacks on cluster deletion

* move validations from cluster config level to command config level

* avoid duplicating stack deletion tasks due to passing name by reference

* fix integration tests

* add eksctl prefix to integrationt test IAM roles

* make IAM roles trust the production EKS Service Principal

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Co-authored-by: Tibi <110664232+TiberiuGC@users.noreply.github.com>

* Add documentation for pod identity associations

* add more details to how pod identity agent addon works

* remove unnecessary empty lines

* refactor as per PR suggestions

* add references to official AWS docs

* generate docs

* rephrase intro

Co-authored-by: Himangini <its_himangini@yahoo.com>

* rephrase news section

Co-authored-by: Himangini <its_himangini@yahoo.com>

* add newline between docs links

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Co-authored-by: Himangini <its_himangini@yahoo.com>