[Security Solution][Exception Lists] Prevent loading of >10k value list items into memory

[rylnd]

Summary

As a result of the investigation in #211637, it was discovered that we do in fact load all of the items from a particular value list into memory during the deletion of said list. As per #203017, this should be mitigated as much as possible.

This might involve performing these deletions in batches, or we might be able to stretch beyond the soft 10k limit by minimizing the data that we're retrieving (as suggested in #203017).

However, it appears as though the current logic is a consequence of our current APIs, so we may need to develop some additional functionality (perhaps as public HTTP endpoints) to make this work.

[elasticmachine]

Pinging @elastic/security-solution (Team: SecuritySolution)

[elasticmachine]

Pinging @elastic/security-detection-engine (Team:Detection Engine)