Add ~.validation.method package

Extract classes from ~.validation.beanvalidation without a direct
dependency on beanvalidation.

See gh-30644

spring-webflux/src/main/java/org/springframework/web/reactive/result/method/InvocableHandlerMethod.java

@@ -44,7 +44,7 @@ import org.springframework.http.server.reactive.ServerHttpResponse;
 import org.springframework.lang.Nullable;
 import org.springframework.util.CollectionUtils;
 import org.springframework.util.ObjectUtils;
-import org.springframework.validation.beanvalidation.MethodValidator;
+import org.springframework.validation.method.MethodValidator;
 import org.springframework.web.method.HandlerMethod;
 import org.springframework.web.reactive.BindingContext;
 import org.springframework.web.reactive.HandlerResult;

spring-webflux/src/main/java/org/springframework/web/reactive/result/method/annotation/ControllerMethodResolver.java

@@ -39,7 +39,7 @@ import org.springframework.http.codec.HttpMessageReader;
 import org.springframework.lang.Nullable;
 import org.springframework.util.Assert;
 import org.springframework.util.ReflectionUtils.MethodFilter;
-import org.springframework.validation.beanvalidation.MethodValidator;
+import org.springframework.validation.method.MethodValidator;
 import org.springframework.web.bind.annotation.InitBinder;
 import org.springframework.web.bind.annotation.ModelAttribute;
 import org.springframework.web.bind.annotation.RequestMapping;

spring-webflux/src/main/java/org/springframework/web/reactive/result/method/annotation/RequestMappingHandlerAdapter.java

@@ -35,7 +35,7 @@ import org.springframework.lang.Nullable;
 import org.springframework.util.Assert;
 import org.springframework.util.ClassUtils;
 import org.springframework.util.CollectionUtils;
-import org.springframework.validation.beanvalidation.MethodValidator;
+import org.springframework.validation.method.MethodValidator;
 import org.springframework.web.bind.support.WebBindingInitializer;
 import org.springframework.web.method.HandlerMethod;
 import org.springframework.web.method.annotation.HandlerMethodValidator;

spring-webflux/src/main/java/org/springframework/web/reactive/result/method/annotation/ResponseEntityExceptionHandler.java

@@ -30,7 +30,7 @@ import org.springframework.http.HttpStatusCode;
 import org.springframework.http.ProblemDetail;
 import org.springframework.http.ResponseEntity;
 import org.springframework.lang.Nullable;
-import org.springframework.validation.beanvalidation.MethodValidationException;
+import org.springframework.validation.method.MethodValidationException;
 import org.springframework.web.ErrorResponse;
 import org.springframework.web.ErrorResponseException;
 import org.springframework.web.bind.annotation.ControllerAdvice;

spring-webflux/src/test/java/org/springframework/web/reactive/result/method/annotation/MethodValidationTests.java

@@ -43,7 +43,7 @@ import org.springframework.validation.FieldError;
 import org.springframework.validation.Validator;
 import org.springframework.validation.annotation.Validated;
 import org.springframework.validation.beanvalidation.LocalValidatorFactoryBean;
-import org.springframework.validation.beanvalidation.ParameterValidationResult;
+import org.springframework.validation.method.ParameterValidationResult;
 import org.springframework.validation.beanvalidation.SpringValidatorAdapter;
 import org.springframework.web.bind.WebDataBinder;
 import org.springframework.web.bind.annotation.InitBinder;

spring-webflux/src/test/java/org/springframework/web/reactive/result/method/annotation/ResponseEntityExceptionHandlerTests.java

@@ -37,8 +37,8 @@ import org.springframework.http.ProblemDetail;
 import org.springframework.http.ResponseEntity;
 import org.springframework.util.LinkedMultiValueMap;
 import org.springframework.validation.BeanPropertyBindingResult;
-import org.springframework.validation.beanvalidation.MethodValidationException;
-import org.springframework.validation.beanvalidation.MethodValidationResult;
+import org.springframework.validation.method.MethodValidationException;
+import org.springframework.validation.method.MethodValidationResult;
 import org.springframework.web.ErrorResponse;
 import org.springframework.web.ErrorResponseException;
 import org.springframework.web.bind.support.WebExchangeBindException;