Allow reading creds as env var for account mgmt commands

[sam-nguyen7]

https://issues.redhat.com/browse/OSD-20603

Update osdctl account mgmt commands to use RH SSO credentials generated via https://github.com/app-sre/rh-aws-saml-login which spawns a new shell with the AWS_ACCOUNT_NAME environment variable.

[sam-nguyen7]

/hold for testing assign command fails due to: error: operation error Organizations: CreateAccount, https response error StatusCode: 400, RequestID: bb0e1fda-4bed-411d-a2c4-1ad6d68594f5, AccessDeniedException: You don't have permissions to access this resource.

MR was created to add permission: https://gitlab.cee.redhat.com/service/app-interface/-/merge_requests/114730

[sam-nguyen7]

/label tide/merge-method-squash

[sam-nguyen7]

/hold cancel

[openshift-ci[bot]]

@sam-nguyen7: all tests passed!

Full PR test history. Your PR dashboard.

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes-sigs/prow repository. I understand the commands that are listed here.

[iamkirkbater]

/lgtm

Thanks for making the changes!

[openshift-ci[bot]]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: iamkirkbater, sam-nguyen7

The full list of commands accepted by this bot can be found here.

The pull request process is described here

Needs approval from an approver in each of these files:

• ~~OWNERS~~ [iamkirkbater,sam-nguyen7]

Approvers can indicate their approval by writing /approve in a comment Approvers can cancel approval by writing /approve cancel in a comment