GCP Service Account IAM Binding Manipulation

Detects modifications to Google Cloud IAM policies where permissions are granted that allow service account impersonation or key management (e.g., serviceAccountTokenCreator, serviceAccountKeyAdmin, workloadIdentityUser, serviceAccountUser). These roles are frequently abused by attackers to gain durable, persistent access or escalate privileges by generating tokens as highly-privileged service accounts without requiring an existing service account key.