Provide API to easily create repository bean definitions [DATACMNS-420]

[spring-projects-issues]

Oliver Drotbohm opened DATACMNS-420 and commented

Currently the repository configuration package contains dedicated helper classes to implement store specific BeanDefinitionParser and ImportBeanDefinitionRegistrar classes. However it still requires a bit of duplication in case you want to programmatically use them and tweak configuration settings (see this snippet of an early Spring Boot version for example).

We should provide a more coarse grained component to trigger repository bean definition registration that uses the already in place abstractions (RepositoryConfigurationSource, RepositoryConfigurationExtension)

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Referenced from: commits spring-projects/spring-data-jpa@b158537