* es/master: (23 commits)
Switch full-cluster-restart to new style Requests (#32140)
[DOCS] Clarified that you must remove X-Pack plugin when upgrading from pre-6.3. (#32016)
Remove BouncyCastle dependency from runtime (#32193)
INGEST: Extend KV Processor (#31789) (#32232)
INGEST: Make a few Processors callable by Painless (#32170)
Add region ISO code to GeoIP Ingest plugin (#31669)
[Tests] Remove QueryStringQueryBuilderTests#toQuery class assertions (#32236)
Make sure that field aliases count towards the total fields limit. (#32222)
Switch rolling restart to new style Requests (#32147)
muting failing test for internal auto date histogram to avoid failure before fix is merged
MINOR: Remove unused `IndexDynamicSettings` (#32237)
Fix multi level nested sort (#32204)
Enhance Parent circuit breaker error message (#32056)
[ML] Use default request durability for .ml-state index (#32233)
Remove indices stats timeout from monitoring docs
Rename ranking evaluation response section (#32166)
Dependencies: Upgrade to joda time 2.10 (#32160)
Remove aliases resolution limitations when security is enabled (#31952)
Ensure that field aliases cannot be used in multi-fields. (#32219)
TESTS: Check for Netty resource leaks (#31861)
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