See gh-21885

Closes gh-21880

This commit aligns log4j2's behavior with logback such that loggers
with a null configuredLevel are also returned by the actuator endpoint.

Fixes gh-20037

Fixes gh-21293

See gh-21716

See gh-21716

Update the pipeline YAML to use ((milestone)) rather than ((branch))
when tagging docker images.

See gh-21716

Closes gh-21877

Closes gh-21876

Use YAML anchors and aliases to reduce the amount of repetition
in our CI pipeline YAML.

Closes gh-21716

Fixes gh-21036 in 2.3.1

This commit updates the logic for handling binding exceptions in the
management context when it is separate from the application context.
The changes allow the exception details to be visible to
DefaultErrorAttributes without causing the servlet container to
detect an error condition.

Fixes gh-21036

Closes gh-21778

Closes gh-21775

Closes gh-21774

Closes gh-21777

Closes gh-21871

Closes gh-21870

Previously, HttpMessageConvertersAutoConfiguration registered
ServerProperties. When this happened in a parent context, any child
contexts would skip registering ServerProperties due to its presence
in the parent context. This prevents the child contexts from
configuring their own server properties.

This commit updates HttpMessageConvertersAutoConfiguration to
bind server.servlet.encoding directly instead of enabling
ServerProperties. With ServerProperties no longer enabled in a parent
context, child contexts are now able to configure their own server
properties.

Fixes gh-21789

* pr/21769:
  Back-off if a custom ReactiveSessionFactory is defined

Closes gh-21769

This commit makes sure that CassandraReactiveDataAutoConfiguration does
not create a reactiveCassandraSessionFactory bean if the user has
provided their own.

See gh-21769

Closes gh-21865