Replace deprecated StreamUtils API

As of spring-projects/spring-framework#29125,
`StreamUtils..emptyInput()` is deprecated in favor of
`InputStream.nullInputStream()` from the JDK.

Closes: #4160

Author: bclozel

spring-data-mongodb/src/main/java/org/springframework/data/mongodb/gridfs/GridFsUpload.java

@@ -24,7 +24,6 @@
 import org.springframework.data.util.Lazy;
 import org.springframework.lang.Nullable;
 import org.springframework.util.Assert;
-import org.springframework.util.StreamUtils;
 
 import com.mongodb.client.gridfs.model.GridFSFile;
 
@@ -74,7 +73,7 @@ public String getFilename() {
 
 	@Override
 	public InputStream getContent() {
-		return dataStream.orElse(StreamUtils.emptyInput());
+		return dataStream.orElse(InputStream.nullInputStream());
 	}
 
 	@Override