Add basic support for Meilisearch

[cmltaWt0]

Regarding the initial discussion about Meilisearch I propose to create a POC for Meilisearch support in Harmony.

https://artifacthub.io/packages/helm/meilisearch-kubernetes/meilisearch

[bradenmacdonald]

Ideally it would integrate with https://github.com/open-craft/tutor-contrib-meilisearch

[Ian2012]

Given the recent updates and that Meilisearch doesn't support Horizontal Scaling, we have decided to keep a separate Meilisearch installation per openedx installation as Meilisearch resources needs are lower than ElastichSearch and there is no need to unify them.