[FEATURE] Missing support for alias atomic swap (make alias point to another index)

[IhnatKlimchuk]

Disclaimer: I understand that client is not finalized and plenty of features will be added. Thank you for work, I really appreciate it. Meanwhile, I have to put a workaround in my code and add a link as follow up. I will use this ticket as monitor on the feature.

Elastic.Clients.Elasticsearch version:
8.0.4

Elasticsearch version:
8.x

.NET runtime version:
7.0

Operating system version:
Windows

Description of the problem including expected versus actual behavior:
In 8.0.4 client version PutAlias do not support for alias atomic index swap. PutAlias only adds new index to alias. Delete and create new alias is required, while it can lead to failed requests while alias is down.

Expected behavior
Client should support alias atomic index swap

[stevejgordon]

Thanks for raising this gap @IhnatKlimchuk. We'll take a look at introducing this.

Note to self: We need to unskip and test indices.update_aliases in the code generator.