fix: remove ibm_iam_account_settings from da

[Soaib024]

Description

#742
https://github.ibm.com/GoldenEye/issues/issues/11138

Parse existing_cos_instance_id which is required variable for both DA to get account id

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[Soaib024]

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[Soaib024]

/run pipeline

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🎉 This PR is included in version 8.13.3 🎉

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