fix: [AuditManager] Update existing packaging option cloud.google.com/go/auditmanager/apiv1/auditmanagerpb;auditmanagerpb for go_package (#8953)

* fix!: Update existing packaging option `cloud.google.com/go/auditmanager/apiv1/auditmanagerpb;auditmanagerpb` for `go_package`

PiperOrigin-RevId: 875794180

Source-Link: googleapis/googleapis@9637e50

Source-Link: googleapis/googleapis-gen@1aed2b6
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