feat(opensearch): implement support for opensearch acls

[mortenlj]

Fixes #315

[Serpentiel]

hey, @mortenlj! 👋

thank you for your contribution!

it is possible to manage the OpenSearch ACLs via the ElasticSearch API, have you tried to use it?

this is the way our Terraform provider manages them; I'm not sure if we would want to have duplicates of the similar endpoints

[mortenlj]

it is possible to manage the OpenSearch ACLs via the ElasticSearch API, have you tried to use it?

No, didn't try as the Elasticsearch API isn't documented anywhere. I see now that it works.

I'm not sure if we would want to have duplicates of the similar endpoints

For what it's worth, keeping the client code for a product you no longer offer while not having client code for the product that has replaced it seems somewhat of a strange choice. 🙂
Especially since it would seem there is some kind of compatability-layer in the API to convert from opensearch to elasticsearch, which presumably is going to be removed at some point.

[Serpentiel]

also, I suggest that you update ElasticSearch part of the client and mark the methods as deprecated

[Serpentiel]

hmm, looks like commitlint has failed on this PR because of your 2nd commit; could you perhaps squash the commits in the single, original one? thank you!

[mortenlj]

hmm, looks like commitlint has failed on this PR because of your 2nd commit; could you perhaps squash the commits in the single, original one? thank you!

Tried doing that, only to now realize I've picked up a random dependabot commit on the way. Not sure how to undo that, my git fu isn't that strong ...

[Serpentiel]

hey, @mortenlj! 👋

I could fix it for you if you allow edits of this PR for maintainers in the PR

[mortenlj]

I could fix it for you if you allow edits of this PR for maintainers in the PR

I couldn't find that option, but got some help with the git commands and managed to fix it I believe.

[Serpentiel]

lgtm