feat: Enabling support for Pod Identity

[rodrigobersa]

What does this PR do?

• Adding Pod Identity Association Resource
• Updating IAM Policy to provide required Pod Identity trust policy
• Adding variables to support Pod Identity
• Adding outputs to consume Pod Identity configuration

Motivation

Pod Identity aims to be the default option for granting permissions to addons. We should adopt this in the v2.

Test Results

Addons PR

Additional Notes

$ pre-commit run --files *
Terraform fmt............................................................Passed
Terraform validate.......................................................Passed
Terraform docs...........................................................Passed
Terraform validate with tflint...........................................Passed
check for merge conflicts................................................Passed
fix end of files.........................................................Passed
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