Chunk through high-volume produce requests

[shouples]

Going above 2500 seems to cause some blockage:

We should also try to increment the existing progress notification:

vscode/src/commands/topics.ts

Lines 248 to 267 in 3d2b3ee

	vscode.window.withProgress(
	{
	location: vscode.ProgressLocation.Notification,
	title: `Producing ${contents.length} message${contents.length > 1 ? "s" : ""} to topic "${topic.name}"...`,
	cancellable: false,
	},
	async () => {
	// TODO: chunk through this and increment progress?
	await produceMessageBatch(contents, topic);
	},
	);
	}
	}
	async function produceMessageBatch(contents: any[], topic: KafkaTopic) {
	const plural = contents.length > 1 ? "s" : "";
	const promises: Promise<ProduceResult>[] = contents.map((content) =>
	produceMessage(content, topic),
	);
	const produceResults: ProduceResult[] = await Promise.all(promises);

[shouples]

Done in #992