Remove additional APIs deprecated for removal in 6.2

[sbrannen]

Remove additional APIs that have been "deprecated for removal in 6.2".

Candidates

• org.springframework.http.codec.ResourceHttpMessageWriter.addHeaders(ReactiveHttpOutputMessage, Resource, MediaType, Map<String, Object>)
• org.springframework.web.bind.MethodArgumentNotValidException.errorsToStringList(List<? extends ObjectError>)
• org.springframework.web.bind.MethodArgumentNotValidException.errorsToStringList(List<? extends ObjectError>, MessageSource, Locale)
• org.springframework.web.bind.MethodArgumentNotValidException.resolveErrorMessages(MessageSource, Locale)
• org.springframework.web.bind.support.WebExchangeBindException.resolveErrorMessages(MessageSource, Locale)
• org.springframework.web.service.invoker.HttpRequestValues.HttpRequestValues(HttpMethod, URI, String, Map<String, String>, HttpHeaders, MultiValueMap<String, String>, Map<String, Object>, Object)
• org.springframework.web.service.invoker.HttpRequestValues.getBody()
• org.springframework.web.service.invoker.HttpRequestValues.getBodyElementType()
• org.springframework.web.service.invoker.HttpRequestValues.Builder.addRequestPart(String, P, ResolvableType)
• org.springframework.web.service.invoker.HttpRequestValues.Builder.setBody(P, ParameterizedTypeReference<T>)
• org.springframework.web.service.invoker.HttpRequestValues.Builder.createRequestValues(HttpMethod, URI, String, Map<String, String>, HttpHeaders, MultiValueMap<String, String>, Map<String, Object>, Object)
• org.springframework.web.service.invoker.HttpServiceProxyFactory.builder(HttpClientAdapter)
• org.springframework.web.service.invoker.HttpServiceProxyFactory.Builder.clientAdapter(HttpClientAdapter)
• org.springframework.web.util.UriComponentsBuilder.parseForwardedFor(HttpRequest, InetSocketAddress)
• org.springframework.web.reactive.function.client.support.WebClientAdapter.forClient(WebClient)
• org.springframework.web.reactive.result.view.freemarker.FreeMarkerView.getTemplate(Locale)

Update Notice for removal to 7.0

• org.springframework.http.client.OkHttp3ClientHttpRequestFactory
• org.springframework.web.util.UriComponentsBuilder.fromHttpRequest(HttpRequest)

Related Issues

• Remove APIs deprecated for removal in 6.2 #30608
• Remove deprecated API from WebContentGenerator #31492