[Issue 1487] Fix ErrorDecoder not invoked for Apache HttpClient checked exceptions

[gitshabh]

Problem

When Apache HttpClient throws checked exceptions like ProtocolException (e.g., missing Location header on 303 redirect), the ErrorDecoder was never invoked because the exception occurred during client.execute() before a Response object was created.

Root Cause

The ErrorDecoder interface requires a Response object: [Exception decode(String methodKey, Response response)]. When execution fails with checked exceptions, there's no Response to pass, causing the exception to propagate uncaught and potentially get wrapped in UndeclaredThrowableException.

Solution:

Build Response with appropriate status codes in case of ProtocolException instead of throwing exception so that error decoder can be invoked.

[gitshabh]

@velo
Hi, we can see the "Redirection but no location header" in the FeignException instead of UndeclaredThrowableException. Do you think this solution is correct?