Implements a new AutoConfigurationLoader, which loads
auto-configurations from a file in META-INF/spring-boot.
Adapts the AutoConfigurationImportSelector to use the new loader.
Adapts the ImportAutoConfigurationImportSelector to use the new loader.
Adapts the metadata plugin in the build to additionally load the
auto-configurations from the new file.
Updates the documentation for auto-configurations and test slices.
Closes gh-29872
This annotation can be used to mark auto-configurations with a dedicated
annotation. Under the hood, it's a standard @Configuration with
proxyBeanMethods set to false.
Closes gh-29870
This involved a small code change to the generated configuration
properties snippets. The section id has to start with
'appendix.', otherwise the section-id asciidoctor extension
complains. To ensure that the anchors that are derived from the
section IDs remain backwards compatible, the anchor-rewrite
properties have been updated.
See gh-29667