[Index Management] Disable support for some index actions

[alisonelizabeth]

In serverless, certain index actions will be blocked by Elasticsearch. We need to account for this in Index Management and not surface these actions.

This includes the following ES APIs:

• /{index}/_cache/clear
• /{index}/_flush
• /{index}/_forcemerge
• /{index}/_freeze
• /{index}/_unfreeze
• /{index}/_stats
• /{index}/_close (internal access only)
• /{index}/_refresh

[elasticmachine]

Pinging @elastic/platform-deployment-management (Team:Deployment Management)

[sabarasaba]

@alisonelizabeth The Add lifecycle policy action comes from an extension I believe. Should those be disabled all together?

[yuliacech]

@sabarasaba I think the actions that are added by ILM will not be visible if ILM is disabled. So we don't need to remove the extension service per se I believe but check that they are hidden correctly.