Merge 'stable-3.3'

This contains a revert of the change that brought back
experiments on stable-3.3 that we already deleted on
master: fdbdb214702e

* origin/stable-3.3:
  Set version to 3.3.2-SNAPSHOT
  Set version to 3.3.1
  Set version to 3.2.7-SNAPSHOT
  Set version to 3.2.6
  Set version to 3.1.12-SNAPSHOT
  Set version to 3.1.11
  Fix httpcore dependency needed by httpclient
  Revert "Add support for Elasticsearch version 7.9.*"
  Revert "Add support for Elasticsearch version 7.10.*"
  Expose patch set level comment in stream event
  Ship a list of default experiments from the backend and allow disabling
  Revert "Clean up comment experiment flags"
  Make UI experiments configurable from gerrit.config
  ForRef#check should permit internal users to read all refs
  Bazel: Adapt RBE to produce Java 11 language level
  Add Jacek Centkowski to developers
  Add support for Elasticsearch version 7.10.*
  Add support for Elasticsearch version 7.9.*
  Align http dependencies with elasticsearch-rest-client
  ChangeNotes: Don't use ChangeIndex when we can avoid it

Change-Id: I873b0714115c779a536487b0c2a95159feefc6b1
tree: de20e8d53cf7f039b5f0a50d3805ee17f341e090
  1. java/
  2. javatests/