Add a new `HttpClientAutoConfiguration` class that provides
`ClientHttpRequestFactoryBuilder` and `ClientHttpRequestFactorySettings`
beans and new configuration properties.
The existing `RestTemplate`, `RestClient` and `WebServiceTemplate`
auto-configurations have been updated to make use of the new
HTTP client support.
Users may now set `spring.http.client` property to globally change
the `ClientHttpRequestFactory` used in their application.
Closes gh-36266
3a8b2e4bc8