Incorrect types for repeated enum fields

[chingor13]

An enum field usually has a type like: https://github.com/googleapis/nodejs-web-risk/blob/c3c2f0638124d2e876ee36925e5766e1c7dc447b/protos/protos.d.ts#L141

threatType?: (google.cloud.webrisk.v1.ThreatType|keyof typeof google.cloud.webrisk.v1.ThreatType|null);

A repeated enum field does not have the keyof typeof part of the union: https://github.com/googleapis/nodejs-web-risk/blob/c3c2f0638124d2e876ee36925e5766e1c7dc447b/protos/protos.d.ts#L571

threatTypes?: (google.cloud.webrisk.v1.ThreatType[]|null);