Adapt for 3.11.0 Includes: - Bump default Java version to 21 - Bump Bazel version to 7.2.1 - Bump Gerrit Docker image to 3.11.0-ubuntu24 - Bump eslint and rollup versions to match 3.11 core - Bump node version to match 3.11 core (20.14.0) Release-Notes: Support Gerrit v3.11 Change-Id: I9d2bd09f2582f274ac1d016c238cc7ea7aa183cc