Incompatible with setupAiProvider config action

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Problem/Motivation

setupAiProvider cannot configure the Vertex AI provider currently because getSetupData() is not implemented by the provider and does not specify the config property name. However, before fix this problem we have to fix #3562874: Config schema issue general_credential_file vs general_credentials_file.

See similar issue filed for Amazee AI Provider: #3566598: Implement getSetupData() in the AI provider

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