Epic: Auto Detect Opensearch Version

[sarahzinger]

Tasks:

• Design Doc for Open Search Versioning #121
• OpenSearch: add feature toggle for auto-detecting version grafana#66318
• Create resource handler to get version #131
• Add button to auto-detect version to config editor #132
• Remove feature flag code for Detecting Version #170

Notes:

We should implement a feature for opensearch that automatically detects the region. Running a get request to the url (with no query parameters) will return a version object:
'''
{
"name" : "15ffcf528ee3",
"cluster_name" : "docker-cluster",
"cluster_uuid" : "1vbTN7ROS4Sw-8mHbTAIVQ",
"version" : {
"distribution" : "opensearch",
"number" : "2.6.0",
"build_type" : "tar",
"build_hash" : "7203a5af21a8a009aece1474446b437a3c674db6",
"build_date" : "2023-02-24T18:58:37.352296474Z",
"build_snapshot" : false,
"lucene_version" : "9.5.0",
"minimum_wire_compatibility_version" : "7.10.0",
"minimum_index_compatibility_version" : "7.0.0"
},
"tagline" : "The OpenSearch Project: https://opensearch.org/"
}
'''
We can use this to fetch and set the version automatically.

[fridgepoet]

Closing this as done, please re-open if that's not the case!