Fixes gh-21620

Closes gh-21597

Update `YamlJsonParser` and `OriginTrackedYamlLoader` to ensure that
custom types cannot be loaded.

Closes gh-21596

* pr/21540:
  Fix links for Apache Camel starter

Closes gh-21540

See gh-21540

* pr/21480:
  Polish "Use the container IP address for tests using TestContainer"
  Use the container IP address for tests using TestContainer

Closes gh-21480

See gh-21480

See gh-21480

See gh-21392

* pr/21392:
  Fix uri tag for empty path

Closes gh-21392

See gh-21392

* pr/21485:
  Fix typo in section 4.30.6

Closes gh-21485

See gh-21485

Closes gh-21526

Closes gh-21525

Closes gh-21527

Closes gh-21282

Fixes gh-21354

Closes gh-21471

Closes gh-21466

There's a bug in Undertow that means it may leak a file handle is
the server is stopped immediately after a response to an SSL request
has been received. The stop processing races with Undertow's SSL
support tidying things up after sending the response. When the stop
processing wins, the tidying up fails with a NullPointerException that
prevents an input stream from being closed. On Windows, the input
stream remaining open prevents JUnit from being able to clean up its
temporary directory.

This commit uses Awaitility to wait for the file that's being served
over SSL to be deleted before stopping the server. On Windows, this
will delay the stop processing from beginning until after the tidy up
that's performed after sending the response has been completed,
hopefully eliminating the race condition that resulted in the input
stream being left open.

Fixes gh-21172

Closes gh-21447

Closes gh-21446

Update `EndpointDiscoverer` so that `@Endpoint` and `@EndpointExtension`
beans are created as late as possible.

Prior to this commit, endpoint beans and extension beans would be
created during the discovery phase which could cause early bean
initialization. The problem was especially nasty when using an embedded
servlet container since `ServletEndpointRegistrar` is loaded as the
container is initialized. This would trigger discovery and load all
endpoint beans, including the health endpoint, and all health indicator
beans.

Fixes gh-20714

This reverts commit 7b790299.

See gh-21375

Restore the `getUseRelativeRedirects` method with a `Boolean` object
result and introduce `isUseRelativeRedirects` for the primitive boolean
variant.

See gh-20796

Closes gh-21375

Prior to this commit, details about an exception would get dropped when
the management context was separate from the application context and
an actuator endpoint threw a binding exception.

This commit adds some logic to capture the exception so the management
context error handlers can add the appropriate attributes to the error
response.

Fixes gh-21036

Closes gh-21421

Closes gh-21366

Closes gh-20686

* pr/21318:
  Polish "Align TestRestTemplate Javadoc with documentation"
  Align TestRestTemplate Javadoc with documentation

Closes gh-21318

See gh-21318

See gh-21318

Closes gh-21351