[Search service] Add support for frozen indices and rollups

[lukasolson]

Background

The new search service was built in the new platform data plugin here: #46742. We need to add support in the new search service and querying rollups and frozen indices.

See also #50953, #52352.

Implementation

We will create a new EnhancedData plugin with an EnhancedSearch service. It will override the existing strategy registered with ES_SEARCH_STRATEGY (yet still be able to access the internal implementation to avoid code duplication) and enhance the strategy with the following behavior:

1. Send the ignore_throttled parameter based on the search:includeFrozen UI setting
2. Query the _rollup_search endpoint (instead of _search) if the given index pattern has type: 'rollup'.
3. Remove the code in the rollups plugin that adds a search strategy to the legacy search mechanism.

[elasticmachine]

Pinging @elastic/kibana-app-arch (Team:AppArch)