Spring Http interface client supports request metadata customization

Now, HttpServiceProxyFactory supports passing HttpRequestValuesResolver to customize the request metadata.

HttpServiceProxyFactory factory = HttpServiceProxyFactory.builder()
                .customRequestValuesResolver(new CustomHttpRequestValuesResolver())
                .build();

The handling logic for @HttpExchange has been moved to HttpExchangeRequestValuesResolver.

Fixes #30733

Comment From: pivotal-cla

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Comment From: rstoyanchev

Closing as discussed in https://github.com/spring-projects/spring-framework/issues/30733#issuecomment-1641661340