BulkOperationDescriptor naming property IfSequenceNumber instead of IfSeqNo

[Tasteful]

When working with the BulkOperationDescriptor to delete documents the IfSeqNo property is named IfSequenceNumber and is not consequent with other methods.

https://github.com/elastic/elasticsearch-net/blob/9e58d38688dfb1f15ba6868379c769adf488225b/src/Elastic.Clients.Elasticsearch/Types/Core/Bulk/BulkOperationDescriptor.cs#LL34C25-L34C25