Introduce 'value' alias for 'attribute' in @AliasFor

SPR-11512 introduced support for annotation attribute aliases via
@AliasFor, requiring the explicit declaration of the 'attribute'
attribute. However, for aliases within an annotation, this explicit
declaration is unnecessary.

This commit improves the readability of alias pairs declared within an
annotation by introducing a 'value' attribute in @AliasFor that is an
alias for the existing 'attribute' attribute. This allows annotations
such as @ContextConfiguration from the spring-test module to declare
aliases as follows.

public @interface ContextConfiguration {

     @AliasFor("locations")
     String[] value() default {};

     @AliasFor("value")
     String[] locations() default {};

    // ...
}

Issue: SPR-13289

spring-web/src/main/java/org/springframework/web/bind/annotation/ControllerAdvice.java

@@ -68,7 +68,7 @@ public @interface ControllerAdvice {
 	 * @since 4.0
 	 * @see #basePackages()
 	 */
-	@AliasFor(attribute = "basePackages")
+	@AliasFor("basePackages")
 	String[] value() default {};
 
 	/**
@@ -82,7 +82,7 @@ public @interface ControllerAdvice {
 	 * alternative to String-based package names.
 	 * @since 4.0
 	 */
-	@AliasFor(attribute = "value")
+	@AliasFor("value")
 	String[] basePackages() default {};
 
 	/**

spring-web/src/main/java/org/springframework/web/bind/annotation/CookieValue.java

@@ -51,14 +51,14 @@ public @interface CookieValue {
 	/**
 	 * Alias for {@link #name}.
 	 */
-	@AliasFor(attribute = "name")
+	@AliasFor("name")
 	String value() default "";
 
 	/**
 	 * The name of the cookie to bind to.
 	 * @since 4.2
 	 */
-	@AliasFor(attribute = "value")
+	@AliasFor("value")
 	String name() default "";
 
 	/**

spring-web/src/main/java/org/springframework/web/bind/annotation/CrossOrigin.java

@@ -51,7 +51,7 @@ public @interface CrossOrigin {
 	/**
 	 * Alias for {@link #origins}.
 	 */
-	@AliasFor(attribute = "origins")
+	@AliasFor("origins")
 	String[] value() default {};
 
 	/**
@@ -62,7 +62,7 @@ public @interface CrossOrigin {
 	 * <p>If undefined, all origins are allowed.
 	 * @see #value
 	 */
-	@AliasFor(attribute = "value")
+	@AliasFor("value")
 	String[] origins() default {};
 
 	/**

spring-web/src/main/java/org/springframework/web/bind/annotation/MatrixVariable.java

@@ -50,7 +50,7 @@ public @interface MatrixVariable {
 	/**
 	 * Alias for {@link #name}.
 	 */
-	@AliasFor(attribute = "name")
+	@AliasFor("name")
 	String value() default "";
 
 	/**
@@ -58,7 +58,7 @@ public @interface MatrixVariable {
 	 * @since 4.2
 	 * @see #value
 	 */
-	@AliasFor(attribute = "value")
+	@AliasFor("value")
 	String name() default "";
 
 	/**

spring-web/src/main/java/org/springframework/web/bind/annotation/RequestHeader.java

@@ -51,14 +51,14 @@ public @interface RequestHeader {
 	/**
 	 * Alias for {@link #name}.
 	 */
-	@AliasFor(attribute = "name")
+	@AliasFor("name")
 	String value() default "";
 
 	/**
 	 * The name of the request header to bind to.
 	 * @since 4.2
 	 */
-	@AliasFor(attribute = "value")
+	@AliasFor("value")
 	String name() default "";
 
 	/**

spring-web/src/main/java/org/springframework/web/bind/annotation/RequestMapping.java

@@ -309,7 +309,7 @@ public @interface RequestMapping {
 	 * When used at the type level, all method-level mappings inherit
 	 * this primary mapping, narrowing it for a specific handler method.
 	 */
-	@AliasFor(attribute = "path")
+	@AliasFor("path")
 	String[] value() default {};
 
 	/**
@@ -324,7 +324,7 @@ public @interface RequestMapping {
 	 * @see org.springframework.web.bind.annotation.ValueConstants#DEFAULT_NONE
 	 * @since 4.2
 	 */
-	@AliasFor(attribute = "value")
+	@AliasFor("value")
 	String[] path() default {};
 
 	/**

spring-web/src/main/java/org/springframework/web/bind/annotation/RequestParam.java

@@ -59,14 +59,14 @@ public @interface RequestParam {
 	/**
 	 * Alias for {@link #name}.
 	 */
-	@AliasFor(attribute = "name")
+	@AliasFor("name")
 	String value() default "";
 
 	/**
 	 * The name of the request parameter to bind to.
 	 * @since 4.2
 	 */
-	@AliasFor(attribute = "value")
+	@AliasFor("value")
 	String name() default "";
 
 	/**

spring-web/src/main/java/org/springframework/web/bind/annotation/RequestPart.java

@@ -67,14 +67,14 @@ public @interface RequestPart {
 	/**
 	 * Alias for {@link #name}.
 	 */
-	@AliasFor(attribute = "name")
+	@AliasFor("name")
 	String value() default "";
 
 	/**
 	 * The name of the part in the {@code "multipart/form-data"} request to bind to.
 	 * @since 4.2
 	 */
-	@AliasFor(attribute = "value")
+	@AliasFor("value")
 	String name() default "";
 
 	/**

spring-web/src/main/java/org/springframework/web/bind/annotation/ResponseStatus.java

@@ -45,7 +45,7 @@ public @interface ResponseStatus {
 	/**
 	 * Alias for {@link #code}.
 	 */
-	@AliasFor(attribute = "code")
+	@AliasFor("code")
 	HttpStatus value() default HttpStatus.INTERNAL_SERVER_ERROR;
 
 	/**
@@ -55,7 +55,7 @@ public @interface ResponseStatus {
 	 * @since 4.2
 	 * @see javax.servlet.http.HttpServletResponse#setStatus(int)
 	 */
-	@AliasFor(attribute = "value")
+	@AliasFor("value")
 	HttpStatus code() default HttpStatus.INTERNAL_SERVER_ERROR;
 
 	/**

spring-web/src/main/java/org/springframework/web/bind/annotation/SessionAttributes.java

@@ -64,7 +64,7 @@ public @interface SessionAttributes {
 	/**
 	 * Alias for {@link #names}.
 	 */
-	@AliasFor(attribute = "names")
+	@AliasFor("names")
 	String[] value() default {};
 
 	/**
@@ -76,7 +76,7 @@ public @interface SessionAttributes {
 	 * names but rather operate on the model only.
 	 * @since 4.2
 	 */
-	@AliasFor(attribute = "value")
+	@AliasFor("value")
 	String[] names() default {};
 
 	/**