This commit adds a new constructor to `JettyClientHttpConnector` and
deprecates another one. Jetty is not creating `HttpClient` instances
using a builder API, but rather setting immutable configuration at
constructor time and using setters for the rest.
This commit addresses that by deprecating the constructor variant
accepting a `Consumer` and just delegating to Spring's implementation
for setting the client resources as needed.
Closes gh-22977
1cfedb20b8