`granted sso generate` and `granted sso populate` produce legacy SSO configuration

[garysassano]

At re:Invent 2022, AWS introduced SSO sessions for the AWS CLI, offering a simplified method for configuring SSO profiles.

AWS docs: Configuring IAM Identity Center authentication with the AWS CLI

Currently, the granted sso generate and granted sso populate commands still produce legacy SSO configurations, which is not optimal.

Legacy Configuration

[profile my-profile-alpha]
granted_sso_start_url = https://myorg.awsapps.com/start
granted_sso_region = us-east-1
granted_sso_account_id = 123456789012
granted_sso_role_name = AdministratorAccess
common_fate_generated_from = aws-sso
credential_process = aws-sso-util credential-process --profile my-profile-alpha

[profile my-profile-beta]
granted_sso_start_url = https://myorg.awsapps.com/start
granted_sso_region = us-east-1
granted_sso_account_id = 120987654321
granted_sso_role_name = AdministratorAccess
common_fate_generated_from = aws-sso
credential_process = aws-sso-util credential-process --profile my-profile-beta

Modern Configuration

[sso-session my-org]
granted_sso-start-url = https://myorg.awsapps.com/start
granted_sso-region = us-east-1
granted_sso-registration-scopes = sso:account:access
common_fate_generated_from = aws-sso

[profile my-profile-alpha]
granted_sso-session = my-org
granted_sso-account-id = 123456789012
granted_sso-role-name = AdministratorAccess
common_fate_generated_from = aws-sso
credential_process = aws-sso-util credential-process --profile my-profile-alpha

[profile my-profile-beta]
granted_sso-session = my-org
granted_sso-account-id = 120987654321
granted_sso-role-name = AdministratorAccess
common_fate_generated_from = aws-sso
credential_process = aws-sso-util credential-process --profile my-profile-beta

[chrnorm]

I think in this case it would be good to first add support for parsing sso-session options, ensuring compatibility with the native AWS CLI, and then after that add support for templating out the sso-session.

This is something we'd be open to a contribution on!