add 'end' event to minio-js BucketStream (#35990)

'Stream' has 'end' event, but its not listed on the types.
It is added now.

types/minio/index.d.ts

@@ -62,6 +62,7 @@ export interface IncompleteUploadedBucketItem {
 export interface BucketStream<T> extends Stream {
     on(event: 'data', listener: (item: T) => void): this;
     on(event: 'error', listener: (error: Error) => void): this;
+    on(event: 'end', listener: () => void): this;
 }
 
 export interface PostPolicyResult {