Closes gh-12815

Closes gh-12806

Closes gh-12796

Previously, the error page filter used sendError to set the response
status when handling an exception and before forwarding the request
to the error controller. Following the fix for gh-11814, this meant
that the error controller was unable to write its response and the
containers default error page was returned instead.

This commit updates the error page filter to use setStatus rather than
sendError. This ensures that the response has the correct status code
while allowing the error controller to write its body. Tests have
been added to the Tomcat deployment test suite to verify that the
error page filter behaves as intended when dealing with a sent error
and an exception for requests accepting HTML, JSON, or anything.

Closes gh-12787

* pr/12655:
  Polish "Replace Couchbase's deprecated methods"
  Replace Couchbase's deprecated methods

Closes gh-12655

See gh-12655

This commit makes sure that an auto-configuration that requires
`DataSourceProperties` will not break if `DataSourceAutoConfiguration`
has been explicitly excluded.

Closes gh-12512

Closes gh-12755

Closes gh-12779

* pr/12605:
  Add docker-api starter to 3rd party list

See https://github.com/jliu666/docker-api-spring-boot

Closes gh-12605

* gh-12776:
  Fix broken links to Gradle and Maven tools, and CLI samples in README

Closes gh-12776

Closes gh-12775

Closes gh-12774

Closes gh-12773

Closes gh-12721

Closes gh-12772

Closes gh-12771

Closes gh-12770

Closes gh-12406

* pr/12669:
  Polish "Allow validation api without implementation"
  Allow validation api without implementation