[Docs] - Elasticsearch - Split into user and administrator sections

[QuiltSimon]

Currently the documentation page on Elasticsearch has sections relating to end user functionality (querying) and administrator functions (monitoring, auto-tuning and configuration).

Suggest we split this into two sections to better fit into each of the sections Quilt Platform User and Quilt Platform Administrator.

[drernie]

While we are at it: we should probably pull out the Catalog-related entries from the (quilt3) FAQ

Similarly, the Catalog 'Advanced' could be merged into the main "Search & Query"

[drernie]

Possibly irrelevant, but the Admin API docs should be in Advanced (and need to be more readable).

[drernie]

Related: Rethinking Your Data Platform Documentation

Suggests four types:

• Tutorial: I am new to the tool, and I want a hands-on onboarding
• How-to: I know about the tool, but I wonder how to perform a specific task
• Explanation: I want to learn about architecture choices, advanced concepts, etc.
• Reference: I want to get an exhaustive list of all features/methods

[drernie]

NOTE: Warn people that re-indexing > 1M objects can get expensive.

Alternative:

• Opensearch out of memory
• Overview stats incorrect / not updating
  Check SNS topic and/or S3 event source (chain is S3 events => SNS => SQS => Lambda => ES
  ES is out of disk
  Workaround if dropped data while problem was occurring but is now fixed: re-index (not recommended for more than ~10M object buckets unless you're ready for a long re-index)

[drernie]

@QuiltSimon waiting for your review