fix: dead loop inside SocaCliContext.aws() in case of SSO credentials

[staskh]

What does this PR do?

Fix dead loop inside SocaCliContext.aws()

When AWS credentials are received via SSO, the original code is entering an endless loop, resulting in a RecursionError exception.
To replicate error:

aws sso login
invoke admin.test-iam-policies --cluster-name res-demo --aws-region eu-west-1 

How was this PR tested?

Please describe any testing performed.

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Manual test:

aws sso login
invoke admin.test-iam-policies --cluster-name res-demo --aws-region eu-west-1 

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