Azure DevOps OAuth Client Secrets Now Shown Only Once

Introduced a change to Azure DevOps OAuth where client secrets will be shown only once at the time of creation and will no longer be retrievable via the UI or API. This aligns with industry best practices and improves security by reducing the risk of accidental exposure and encouraging secure storage. The Get Registration Secret API will be deprecated and removed. New secret rotation APIs that support overlapping secrets will be available for users who lose access to a secret.