Fix deprecation warning in StreamResource (#24426)

* Remove deprecated `@Valid` usage in StreamResource

* Add changelog

* Remove redundant annotation

* Remove unnecessary changelog

---------

Co-authored-by: Florian Petersen <[email protected]>

Author: xd4rker

graylog2-server/src/main/java/org/graylog2/rest/resources/streams/StreamResource.java

@@ -28,6 +28,7 @@
 import io.swagger.annotations.ApiResponses;
 import jakarta.inject.Inject;
 import jakarta.validation.Valid;
+import jakarta.validation.constraints.NotBlank;
 import jakarta.validation.constraints.NotEmpty;
 import jakarta.validation.constraints.NotNull;
 import jakarta.ws.rs.BadRequestException;
@@ -675,7 +676,7 @@ public Map<String, List<PipelineCompactSource>> getConnectedPipelinesForStreams(
     @Produces(MediaType.APPLICATION_JSON)
     @AuditEvent(type = AuditEventTypes.STREAM_UPDATE)
     public Response assignToIndexSet(@ApiParam(name = "indexSetId", required = true) @PathParam("indexSetId") String indexSetId,
-                                     @ApiParam(name = "JSON body", required = true) @Valid @NotNull List<String> streamIds) {
+                                     @ApiParam(name = "JSON body", required = true) @NotEmpty List<@NotBlank String> streamIds) {
         checkPermission(RestPermissions.INDEXSETS_READ, indexSetId);
         streamIds.forEach(streamId -> {
             checkPermission(RestPermissions.STREAMS_EDIT, streamId);