PutIndexTemplateRequest and PutComponentTemplateRequest lack allow_auto_create field

[ztyzbb]

Description

Both PutIndexTemplateRequest and PutComponentTemplateRequest lacks allow_auto_create field.
Create or update component template API
Create or update index template API
Index template API's doc didn't list this field but it just works when you PUT it.
Hope can backport to 7.17, thank you!

[l-trotta]

Hello, thank you for reporting this! While it looks like PutComponentTemplateRequest was already fixed with this PR , PutIndexTemplateRequest is still missing allow_auto_create; I'll have to investigate this a bit more since it's missing from the documentation as well. If it's actually an accepted parameter then we'll fix the API specification and regenerate the java code from it. Thank you!

[l-trotta]

So, after investigating it turns out there were some mistakes in the documentation, PutComponentTemplateRequest actually doesn't allow allow_auto_create, while PutIndexTemplateRequest does, and there are also other fields with similar mistakes. This specification PR fixes those mistakes for the clients, the docs will be fixed in the future.