Update actuator support to ensure CORS properties always apply

Update `AbstractWebFluxEndpointHandlerMapping` and
`AbstractWebMvcEndpointHandlerMapping` to ensure cors
configuration is applied.

See gh-45487

Author: philwebb

spring-boot-project/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/endpoint/web/reactive/AbstractWebFluxEndpointHandlerMapping.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2024 the original author or authors.
+ * Copyright 2012-2025 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.
@@ -218,6 +218,12 @@ protected CorsConfiguration initCorsConfiguration(Object handler, Method method,
 		return this.corsConfiguration;
 	}
 
+	@Override
+	protected CorsConfiguration getCorsConfiguration(Object handler, ServerWebExchange exchange) {
+		CorsConfiguration corsConfiguration = super.getCorsConfiguration(handler, exchange);
+		return (corsConfiguration != null) ? corsConfiguration : this.corsConfiguration;
+	}
+
 	@Override
 	protected boolean isHandler(Class<?> beanType) {
 		return false;

spring-boot-project/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/endpoint/web/servlet/AbstractWebMvcEndpointHandlerMapping.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2024 the original author or authors.
+ * Copyright 2012-2025 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.
@@ -233,6 +233,12 @@ protected CorsConfiguration initCorsConfiguration(Object handler, Method method,
 		return this.corsConfiguration;
 	}
 
+	@Override
+	protected CorsConfiguration getCorsConfiguration(Object handler, HttpServletRequest request) {
+		CorsConfiguration corsConfiguration = super.getCorsConfiguration(handler, request);
+		return (corsConfiguration != null) ? corsConfiguration : this.corsConfiguration;
+	}
+
 	@Override
 	protected boolean isHandler(Class<?> beanType) {
 		return false;