Closes gh-21570

Closes gh-22094

Fixes gh-21606

Closes gh-22672

Fixes gh-19471

Closes gh-22669

Closes gh-15977

Closes gh-22665

Closes gh-22565

Closes gh-22656

Closes gh-22655

Closes gh-22659

Closes gh-22645

Closes gh-22650

The overhead of build scans seems to have brought us right to the limit
of the Maven JVM's heap. As a result, builds are occasionally failing
as the heap's been exhausted.

This commit increases the JVM's max heap.

Closes gh-22649

Closes gh-22641

Fixes gh-20229

Closes gh-22633

Closes gh-22629

Closes gh-19557

Closes gh-22626

This commit harmonizes dependency declarations for Jackson in the
actuator. Both Jackson and JSR 310 are back to optional in the core
actuator module and mandatory when using the auto-configuration.

Closes gh-22624

Closes gh-22622

Closes gh-22591

Closes gh-22620

* gh-22614:
  Upgrade to Gradle Enterperise Maven Extension 1.6.0

Closes gh-22614

See gh-22614

* gh-22616:
  Add ElasticsearchReactiveHealthIndicator to docs

Closes gh-22616

See gh-22616

Closes gh-22617

* gh-22598:
  Fix link to Elasticsearch health indicator

Closes gh-22598

See gh-22598

Closes gh-22611

* gh-22604:
  Polish "Use milliseconds when configuring awaitTerminationPeriod"
  Use milliseconds when configuring awaitTerminationPeriod

Closes gh-22604

See gh-22604