Service for creating new-style component and index templates in v7.8

[lobocv]

Hi, first of all thank you for this package, it is so much nicer to use than the official client. Amazing work.

I noticed that there seems to be no way to add a component template?
There is a service for adding an index template though.

Which version of Elastic are you using?

[X] elastic.v7 (for Elasticsearch 7.x)
[ ] elastic.v6 (for Elasticsearch 6.x)
[ ] elastic.v5 (for Elasticsearch 5.x)
[ ] elastic.v3 (for Elasticsearch 2.x)
[ ] elastic.v2 (for Elasticsearch 1.x)

Please describe the expected behavior

Ability to create a index and component templates in v7.8 clusters. See new template docs for v7.8:
https://www.elastic.co/guide/en/elasticsearch/reference/7.8/index-templates.html

Please describe the actual behavior

Component / Index template service does not exist

Any steps to reproduce the behavior?

[lobocv]

Sorry, I just realized that component templates are new in v7.8 and AWS only supports up to v7.7. So looks like I won't be using component templates after all (darn).
Feel free to close this issue or leave it open since it would be a nice feature to add eventually.

[olivere]

Looks similar to #1393, so I will close this.

[olivere]

New index template APIs should be done with #1393. Component template APIs are #1414.