Fix the issue of loading partition hanging

[xwjdsh]

The program gets stuck here when I try to load a partition in sync mode.

	err = s.client.LoadPartitions(
		ctx,                     // ctx
		collectionName,          // CollectionName
		[]string{partitionName}, // PartitionNames
		false,                   // async
	)
	if err != nil {
		return nil, err
	}

Then I noticed that the InMemoryPercentages in ShowPartitions response has been deprecated, and I've also used curl http://localhost:9091/api/v1/partitions to confirm that it's not responding. I used c.GetLoadingProgress instead of c.ShowPartitions, and the problem was solved.

[sre-ci-robot]

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[sre-ci-robot]

Welcome @xwjdsh! It looks like this is your first PR to milvus-io/milvus-sdk-go 🎉

[bigsheeper]

Hi @xwjdsh , thank you for your contribution to Milvus. Could you please help modify the LoadCollection as well, like #424. Then I could close my duplicated pr. Have a nice day!

[congqixia]

Hi @xwjdsh thanks for you PR!
It looks like the DCO check failed. Could you please fix that?

[xwjdsh]

@bigsheeper OK, I'll update this. updated.

[xwjdsh]

@congqixia It's OK now.