Closes gh-23276

This commit fixes the behaviour of not triggering a transactional event
listener if no transaction is active. Previously, a transaction boundary
was all that was necessary to trigger the listener regardless of the fact
there was an active transaction.

This commit now prevents `Propagation.NOT_SUPPORTED` and
`Propagation.SUPPORTS` without an active transaction to trigger the
listener.

Closes gh-23276

This commit adds the createException() method to ClientResponse,
returning a delayed WebClientResponseException based on the status code,
headers, and body as well as the corresponding request.

Closes gh-22825

See gh-22839

See gh-23224

This commit refactors the internals of
LocalVariableTableParameterNameDiscoverer to use
java.lang.reflect.Executable in order to simplify the implementation.

Closes gh-23281

* pr/22839:
  Polish "Add nohttp to build"
  Add nohttp to build
  BeanDefinitionParserDelegate uses http://www.springframework.org/schema/
  Fix http URLs

Closes gh-22839

See gh-22839

See gh-22839

See gh-22839

See gh-22839

Eclipse apparently sorts static imports differently.

Prior to this commit, @TestConstructor supported a boolean `autowire`
attribute which naturally limited the configuration to two states: on
or off. Since we may need to support additional autowiring modes in the
future, the use of a boolean is limiting.

This commit address this issue by introducing a new AutowireMode enum
in @TestConstructor with ALL and ANNOTATED constants. In addition, the
attribute has been renamed to `autowireMode`, and the system property
has been renamed to `spring.test.constructor.autowire.mode` for greater
clarity of purpose.

Closes gh-23224

This commit adds an engineSupplier property to ScriptTemplateConfigurer
and ScriptTemplateView in order to be able to customize the ScriptEngine
when sharedEngine is set to false.

This can be useful with Graal.js for example.

Closes gh-23258

See gh-23214

* pr/23274:
  Fix typo in UrlPathHelper

Closes gh-23274

See gh-23274

Closes gh-23267

Revert to state before DefaultMultipartMessageReader

DataBuffers::split (and underlying algorithm) should not be returning
a Flux<DataBuffer>, but rather a Flux<Flux<DataBuffer>>. In other words,
it should not join all data buffers that come before a delimiter.

Providing an implementation of a such a fully reactive split method
proved to be beyond the scope of this release, so this commit removes
the method altogether.

Due to the imminent removal of DataBufferUtils.split, this commit copies
over the buffering split algortihm from DataBufferUtils, as it is still
sutable for the StringDecoder

- Made sure that takeUntilByteCount is usable in multiple subscriptions.
- Added composite Matcher

The DefaultMultipartMessageReader has been removed for 5.2 and will be
part of a future release. This commit switches back to the
SynchronossPartHttpMessageReader.

gh-21659

See gh-23251

Closes gh-23251

Fixes gh-23253

Prior to this commit, the Basic Authentication credentials were encoded for
each request in ExchangeFilterFunctions.basicAuthentication(String, String).

This commit addresses this minor performance issue by encoding the
credentials prior to the creation of the lambda expression returned by
ExchangeFilterFunctions.basicAuthentication(String, String).

Closes gh-23256

Closes gh-23257