HttpServiceProxyFactory raises IllegalStateException if created through the builder and declared as a bean

[rstoyanchev]

After #29296, the public constructor and setters are deprecated in favour of using the programmatic builder, and if the builder is used, the setters raise IllegalStateException, but afterPropertiesSet and setEmbeddedValueResolver need to be more lenient and simply do nothing if the builder was used. Currently, setEmbeddedValueResolver doesn't to that and leads to "IllegalStateException: HttpServiceProxyFactory was created through the builder".

A workaround is to not declare HttpServiceProxyFactory as a bean.