Deprecate CachingConfigurerSupport and AsyncConfigurerSupport

Closes gh-27813

spring-context-support/src/main/java/org/springframework/cache/jcache/config/JCacheConfigurerSupport.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2018 the original author or authors.
+ * Copyright 2002-2021 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -31,7 +31,9 @@ import org.springframework.lang.Nullable;
  * @since 4.1
  * @see JCacheConfigurer
  * @see CachingConfigurerSupport
+ * @deprecated as of 6.0 in favor of implementing {@link JCacheConfigurer} directly
  */
+@Deprecated
 public class JCacheConfigurerSupport extends CachingConfigurerSupport implements JCacheConfigurer {
 
 	@Override

spring-context/src/main/java/org/springframework/cache/annotation/CachingConfigurerSupport.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2018 the original author or authors.
+ * Copyright 2002-2021 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -29,7 +29,9 @@ import org.springframework.lang.Nullable;
  * @author Stephane Nicoll
  * @since 4.1
  * @see CachingConfigurer
+ * @deprecated as of 6.0 in favor of implementing {@link CachingConfigurer} directly
  */
+@Deprecated
 public class CachingConfigurerSupport implements CachingConfigurer {
 
 	@Override

spring-context/src/main/java/org/springframework/scheduling/annotation/AsyncConfigurerSupport.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2014 the original author or authors.
+ * Copyright 2002-2021 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -28,7 +28,9 @@ import org.springframework.lang.Nullable;
  *
  * @author Stephane Nicoll
  * @since 4.1
+ * @deprecated as of 6.0 in favor of implementing {@link AsyncConfigurer} directly
  */
+@Deprecated
 public class AsyncConfigurerSupport implements AsyncConfigurer {
 
 	@Override