Closes gh-23129

Closes gh-23113

Closes gh-23123

Closes gh-23090

Closes gh-23122

Closes gh-23103

Closes gh-23102

Closes gh-23093

* gh-23084:
  Polish "Handle null RSocketServer address when setting port property"
  Handle null RSocketServer address when setting port property

Closes gh-23084

See gh-23084

See gh-23084

Closes gh-23076

* pr/23071:
  Disallow Apache Commons Lang & Lang3 imports

Closes gh-23071

See gh-23071

Closes gh-23075

Closes gh-23059

* pr/23028:
  Polish "Add example of custom Actuator operations"
  Add example of custom Actuator operations

Closes gh-23028

See gh-23028

See gh-23028

Closes gh-23056

Closes gh-23055

See gh-22991

Update `JarFileWrapperTests` so that the jar files are closed after each
test.

See gh-22991

* pr/23002:
  Mention correct JUnit 5 annotations in Kotlin testing section

Closes gh-23002

See gh-23002

Remove Mockto from JarFileWrapperTests since it seems to be failing on
later versions of Java.

See gh-22991

Refine method visibility in an attempt to fix test issues on Java 11+.

See gh-22991

Create a new `JarFileWrapper` class so that we can wrap and existing
`JarFile` and offer a version that can be safely closed.

Prior to this commit, we provided wrapper functionality in the `JarFile`
class itself. Unfortunately, because we override `close` and also create
a lot of wrappers this caused memory issues when running on Java 11.

With Java 11 `java.util.zip.ZipFile` class uses `FinalizableResource`
for any implementation that overrides `close()`. This means that any
wrapper classes will not be garbage collected until the JVM finalizer
thread runs.

Closes gh-22991

* pr/21134:
  Polish 'Order metrics auto-configurations correctly'
  Order metrics auto-configurations correctly

Closes gh-21134

See gh-21134

Update metrics auto-configurations so that they are auto-configured
after `CompositeMeterRegistryAutoConfiguration` in order to ensure
the `MeterRegistry` bean has been defined.

Prior to this commit, metrics auto-configurations that depended on a
`MeterRegistry` has `@AutoConfigureAfter(MetricsAutoConfiguration.class)`
which is not sufficient since `MetricsAutoConfiguration` does not export
a `MeterRegistry`.

See gh-21134

Update `@TypeExcludeFilters` so that it is also annotated with
`@Inherited`.

Closes gh-22939

Update SpringApplicationBuilder.properties method javadoc to fix
inaccuracies and apply more consistency.

Closes gh-22962

* pr/22948:
  Fix typo `Assert4J` -> `AssertJ`

Closes gh-22948

See gh-22948

* pr/22919:
  Polish "Fix conditions that lead to auto-configure PushGateway"
  Fix conditions that lead to auto-configure PushGateway

Closes gh-22919

See gh-22919