How to configure IDP to make use of ExecCredential in RHOCP 4.x

Issue

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• RHOCP product documentation does not mention anything about how to configure IDP with Azure service principles, kubelogin and ExecCredentials resource. How should this be configured properly? Which IDP provider should be used?
• While trying to implement an Identity Provider (IDP) for service principals from Azure AD according to https://github.com/Azure/kubelogin, kubelogin sends a token back, but looks like IDP needs to be configured to actually handle the token validation.