Closes gh-22234

Since Spring Framework 4.3.0.RC2, a default embedded value resolver
has been registered with the bean factory when one is not otherwise
configured. This meant that placeholders in `@Value` would be resolved
with or without PropertyPlaceholderAutoConfiguration defining a
PropertySourcesPlaceholderConfigurer bean. However, placeholders in
bean definitions would only be resolved if a
PropertySourcesPlaceholderConfigurer was defined.

This commit updates PropertyPlaceholderAutoConfigurationTests to align
with this change in Framework. We now test that placeholders are
resolved in `@Value` annotations with or without the auto-configuration
and that placeholders in bean definitions are only resolved with the
auto-configured.

Closes gh-22230

* gh-22227:
  Update to Maven Shade Plugin 3.2.4

Closes gh-22227

See gh-22227

See gh-21921

Fixes gh-21042

Prior to this commit, configuring a reactive Elasticsearch client would
auto-configure an Actuator Health check using a synchronous client, with
the default configuration properties (so tarting localhost:9200).

This would lead to false reports of unhealthy Elasticsearch clusters
when using reactive clients.

This commit reproduces the logic for MongoDB repositories: if a reactive
variant is available, it is selected for the health check
infrastructure.

See gh-21042

Fixes gh-22200

Closes gh-22197

Fixes gh-22038

Closes gh-22190

Closes gh-22193

Closes gh-22189

* gh-21921:
  Reinstate metrics for Kafka Streams

Closes gh-21921

See gh-21921

Closes gh-22185

Closes gh-22183

Closes gh-22182

* gh-22110:
  Improve error handling in JDK upgrade checks

Closes gh-22110

See gh-22110

Closes gh-21938

Closes gh-21937

Fixes gh-22179

Closes gh-22175

* gh-22138:
  Accept empty filter dispatcher types in auto-configurations

Closes gh-22138

Prior to this commit, the usage of EnumSet.copyOf resulted in exceptions when
the underlying collection was empty.

See gh-22138

Closes gh-22147

Closes gh-22171

Closes gh-22170

* gh-22163:
  Remove duplicated icon from git-repo-windows resource definition

Closes gh-22163

See gh-22163

Closes gh-22167

* gh-22141:
  Polish "Avoid NPE when binder is closed before started event"
  Avoid NPE when binder is closed before started event

Closes gh-22141

See gh-22141

Previously, if TomcatMetricsBinder destroy() was called before it had
received an ApplicationStartedEvent an NPE would be thrown due to
TomcatMetrics being null. This NPE was then caught and logged at
warning level by the disposable bean adapter.

This prevents the NPE by checking that the TomcatMetrics instance is
null before calling close() on it.

See gh-22141

Fixes gh-22119

Closes gh-22155